Online Test

Question # 1

Halogens with metals for

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Ionic bond

Covalent bond

Dative covalent bond

Metallic bond

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

Which one of the following is liquid in solid solution?

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sugar in water

butter

opal

fog

Which one of the following non-metal is lustrous?

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Sulphur

Phosphorus

Iodine

Carbon

Tyndall effect is due to:

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block of beam of light

non - scattering of beam of light

scattering of beam of light

passing through beam of light

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

Sodium - potassium alloy is used in nuclear reactor as a:

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catalyst

coolant

reactant

absorber

10 gram sugar is dissolved in 90 gram of water to make a 100 gram solution.This solution is

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10% m/m

10% m/v

10% v/m

10% v/v

If the solute-solute forces are strong enough than those of solute- solvent force, The solute:

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dissolves readily

does not dissolve

dissolve slowly

dissolves and precipitates

One atmospheric pressure is equal to how many pascals?

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101325

10325

106075

10523

The no.of electrons in the valence shell of noble gases is

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1

6

7

8

Molarity is the number of moles of solute dissolved in:

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1 kg of solution

100 g of slovent

Idm³ of solvent

I dm³ of solution

Transition elements are:

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all gases

all metals

all non-metals

all metalloids

Which one of the following is not amorphous?

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rubber

plastic

glass

glucose

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

Which one metal can be cut with a knife?

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Na

Mg

AI

Ca

An atom having six electrons in its achieve noble electronic configuration by:

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gaining one electron

losing all electrons

gaining two electrons

losing two electrons

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

Which of the following can be separated by physical means?

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Mixture

Element

Compound

Radical

Metal can form ions carrying charges:

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Uni-positive

Di-positive

Tri-Positive

All of them

The example of solution of a solid solute in a solid solvent is

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Brass

Fog

Cheese

Air

The right most position in the periodic table is occupied by:

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

Which one of the following is the lightest metal?

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Calcium

Magnesium

Lithium

Sodium

Mist is an example of solution:

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liquid in gas

gas in liquid

solid gas

gas in solid

Which has lowest density?

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liquids

Solids

Gases

Plasma

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

Which has metallic bond?

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H

Na

HCI

P

1 atm = ?

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1 pascal

760 mm of Hg

1 atm

1 Nm^-2

Which one of the following is heterogeneous mixture?

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milk

ink

milk of magnesia

sugar solution

Sodium is exterminate reactive metal, but it does not react with:

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Hydrogen

Nitrogen

Sulphur

Phosphorus

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

Industrial chemistry deals with the manufacturing of compounds:

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in the laboratory

on micro scale

on commercial scale

on economic scale

Considering the electronic configuration of atoms which atom with the given atomic number will be the most stable one?

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6

8

10

12

The SI unit of pressure is:

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N

N/m²

Pascal

atm

Which one of the following is the most penetrating?

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protons

electrons

neutrons

alpha paticles

The 2nd and third periods are called

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short period

Normal period

Long period

Very long period

Tyndall effect is shown by:

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sugar solution

paints

jelly

chalk solution

Mark the incorrect statement about ionization energy:

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it is measured in Kjmol^-1

it is absorption of energy

it decreases in period

it decreases in a group

The reverse of evaporation is:

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Boiling

Diffusion

Condensation

Freezing

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

All metals are solid except

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AI

Mg

Na

Hg

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

Which one of the following metals burns with a brick red flame?

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Sodium

Magnesium

Iron

Calcium

Deuterium is used to make:

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light water

heavy water

soft water

hard water

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

According to Bohr, electrons can revolve only in this orbits whose angular momentum is

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h/2π

n 2h/π

n h2/2π

n h/2π

Identify when pair has polar covalent bonds:

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O₂ and Cl₂

H₂O and N₂

H₂O and C₂H₂

H₂O and HCI

4^th and 5^th period of the long form of periodic table are called

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short periods

Normal periods

Long periods

Very long periods

The maximum no.of electrons that can be accommodated in M shell are

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2

8

18

32

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

Which one metal is least reactive?

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K

Fe

Cu

AI

First energy level is denoted by:

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K

L

M

N

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

1 torr = ?

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1 mm of Hg

1 atm

760 mm of Hg

1 pascal

It is a triatomic molecule

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Sodium chloride

Water

Chalk

Glucose

The equation of relationship between atomic number (Z) and mass number (A) is

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A = Z + N

A = Z - n

A = Z

A =2Z + n

When a saturated solution is diluted it tuns into:

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supersaturated solution

saturated solution

a concentrated solution

unsaturated solution

The elements of group 3 to 12 are called

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Normal elements

Transition elements

Radioactive elements

None of these

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

The mass of one molecule of water is:

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18 amu

18g

18mg

18kg

The empirical formula of glucose is

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CHO

CH2O

C2HO

CHO2

The symbol of lead us

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As

Pb

Sb

Na

The example of solid solute in gas solvent is

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butter

Sugar in water

Smoke in air

Opals

Which one is least oxidizing agent?

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F

CI

I

Br

Which one of the following is not an electrolytic cell:

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Down cell

Galvanic cell

Nelson' cell

Both a and c

All non-metals are non-conductor of heat and electricity except it

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Phosphorous

Sulphur

Graphite

Iodine

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

Which is a polar molecule?

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HCI

H₂

CI₂

O₂

The No. of atoms in 1 mole of carbiton is

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6.02 x 1021

6.02 x 1022

6.02 x 1023

6.02 x 1024

Density of a gas increases, when its:

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temperature is increased

pressure is increased

volume is kept constant

none of these

It is an ionic compound

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H2O

NaCI

CH4

HF

It is heterogeneous mixture

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Sand

Milk

Air

Brass

In peroxides, the oxidation no. of O is

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+1

-1

+3

-3

How many numbers of moles are equivalent to 8 grams of CO₂?

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0.15

0.18

0.21

0.24

Pure alkali metals can be cut simply by knife but iron cannot because of alkali metals have:

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Strong metallic bonding.

Weak metallic bonding

Non- metallic bonding

Moderate metallic bonding

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

Which pair of compounds is soluble?

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Ether and water

KCI and water

Benzene and water

Petrol and water

The amount of energy given out when an electron is added to any atom is called:

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lattice energy

ionization energy

electronegative

electron affinity

The third abundant as found in the earth' crust is:

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Carbon monoxide

Oxygen

Nitrogen

Argon

The no. of electrons in the valence shell of alkali metals is

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1

2

4

7

The molecular mass of water is

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16 amu

14 amu

18 amu

20 amu

The isotopes of an element have different number of

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Electrons

Protons

Neutrons

Protons & Neutrons

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

Which one is a solution?

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Carbonated drinks

Sugar

Benzene

Vineger

Which molecules is donor in nature?

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H₂

NH₃

O₂

HF

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

The number of isotopes of carbon are

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1

2

3

5

The no. of periods in modern periodic table are

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7

11

18

23

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

At freezing point which one of the following coexists in dynamic equilibrium?

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gas and solid

liquid and gas

liquid and solid

all of these

When an electronegative element combines electropositive element the type of bonding is

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covalent

ionic

polar covalent

coordinate covalent

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

Brine is an aqueous solution of

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NaCI

NaOH

AgNO3

CaO

Atoms reacts with each other because:

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They are attracted to each other

they are short of electrons

they want to attain stability

they want to disperse

Which one of the following element is found in most abundance in the earth's crust?

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Oxygen

Aluminum

Silicon

Iron

Who discovered the proton?

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Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

How many number of electrons take part in triple covalent bond?

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2

4

6

8

The cathode of Nelson's cell is made up of

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C

Zn

Cu

Fe

Nelson's cells used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?

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CI₂

H₂

O₃

O₂

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Which element has highest electronegativity?

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CI

F

Br

I

Effusion is a property of:

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Gases

LIquids

Solids

Plasma

When U-235 breaks up, it produces?

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electrons

neutrons

protons

nothing

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

The no. of Ion pair/pairs in ammonia molecule is / are

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1

2

3

4

The symbol of barium is:

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Ba

Bi

Br

B

Gases are the lightest form of mater and their densities are expressed in terms of:

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mg cm^-3

g cm^-3

g dm^-3

kg dm^-3

The colour of calcium metal flame is

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Golden yellow

Brilliant white

Brick red

Light green

One amu (atomic mass unit) is equivalent to:

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1.66x10^-24 mg

1.66x 10^-24g

1.66x10 g

1.66x10^-23mg

The atomic number of potassium is:

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11

15

18

19

The molar mass of H₂SO₄ is:

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98 g

98 amu

9.8 g

9.8 amu

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

The no. of electrons in the valence shell of noble gases are

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2

4

8

2 or 8

Which of the following compound is not directional in its bonding?

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CH⁴

KBr

CO²

H₂O

Which one of the following gas diffuses faster?

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hydrogen

helium

fluorine

chlorine

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

Which radioisotope is used for the diagnosis of tumor in the body?

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cobalt-60

iodine-131

strontium-90

phosphorus-30

The no.of elements in the first period is

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2

8

18

23

Electropositive character depends upon:

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Atomic size

Nuclear charge

Ionization energy

Electron affinity

Octet rule is:

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description of eight electrons

picture of electronic configuration

covalent bonding

attaining of eight electrons

Which one of the following is not an electrolyte?

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sugar solution

sulphuric acid solution

Lime solution

Sodium chloride solution

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

Which one is least reactive non-metal?

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P

C

CI

F

The types of solutions on the basis of their physical states are

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3

6

9

12

Cu + 2AgNO3 -------> Cu(NO3) +2Ag. In this reaction reducing agent is:

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Cu

AgNO3

Cu(NO3)2

Ag

Which one of the following is a galvanic cell?

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Daniel cell

Nelson's cell

Down's cell

Both B and C

Atoms of elements combine chemically to form:

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Mixtures

compounds

solutions

ions

Which gas will diffuse faster than others?

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Hydrogen

Oxygen

Chlorine

Nitrogen

Which one of the following will show negligible effect of temperature on its solubility?

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KCI

KNO³

NaNO³

NaCI

The bond between two atoms will be ionic if the difference between their electronegativities is:

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Less than 1.7

Greater than 1.7

Zero

Less than 1.2

Metal oxides are

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Amphoteric

Basic

Acidic

Neutral

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

How many covalent bond does C₂H₂ molecule have?

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two

three

four

five

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

In the redox reaction between zn and HCI. the oxidizing agent is:

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zn

H⁺

C

H²

Solid particles possess which one of the following motions?

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rotational motions

vibrational motions

translation motions

both translational and vibrational motions

All of the following are tri-atomic molecules except:

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H²

O³

H²O

CO²

Smoke in air is the example of solution.

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Gas in Gas

Gas in liquid

liquid in Gas

Solid in Gas

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

A bond formed between two non-metals is expected to be:

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covalent

ionic

coordinate covalent

metallic

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

Which one of the following is brittle?

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Sodium

Aluminum

Selenium

Magnesium

Force per unit area is called:

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volume

pressure

weight

density

A solution whose molarity is known is called:

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Dilute solution

Concentrated solution

Saturated solution

Molar solution

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

The mathematical formula of Charle's law is:

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PV = k

V/T = k

P = VT

T/V = k

Which one of the following is the weakest force among the atom?

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ionic force

metallic force

intermolecular force

covalent force

Which one of the following solution contains more water?

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2M

IM

0.5M

0.25M

The lowest energy level is

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K

L

M

N

Which shows Tyndall Effect?

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Slution

Colloid

Suspension

True solution

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

The no.of neutrons in deutrium is

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1

2

3

4

The cathode of Daniel cell is made up of

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Zn

Cu

AI

C

A binary solution consists of:

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One component

Two components

Three components

Many components

Metals lose their electrons easily because:

Choose an answer

They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

How many time liquids are denser than gases?

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100 times

1000 times

10,000 times

100,000 times

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

Non-metals are generally soft, but which one of the following is extremely hard?

Choose an answer

Graphite

Phosphorus

Iodine

Diamond

Which of the following result in discovery of proton?

Choose an answer

cathode rays

canal rays

x-rays

alpha rays

The practical unit of concentration is

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%v/v

%v/m

%m/m

M

The atomic radil of the elements in periodic table:

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increase form left to right in period

increase form top to bottom

do not change form left to right in period

decrease form top to bottom in a group

The p subshell has:

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one orbital

two orbitals

three orbitals

four orbitals

Following are elements of 2nd period.Which atom is bigger in size?

Choose an answer

Li

Be

B

C

Which is used for industrial manufacture of NaCI?

Choose an answer

Daniel cell

Down's cell

Nelson's cell

None of these

The absolute zero means:

Choose an answer

273.15 °C

-273.15 °C

0 °C

-373.15 °C

It is a good reducing agent

Choose an answer

Fe

H

C

O

The valency of nitrogen is

Choose an answer

1

2

3

4

Sort out a compound from the following

Choose an answer

Air

Salt

Ice-cream

Iron

The solubility of which salt increases in heating?

Choose an answer

Li₂SO₄

Ce₂(SO₄)₃

NaCI

KCI

The value of Planck's constant is

Choose an answer

6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

In a discharge tube, the pressure of a gas is kept at

Choose an answer

10-2 atm

10-4 atm

10-6 atm

10-8 atm

Which one of the following does not affect the boiling point?

Choose an answer

intermolecular forces

external pressure

nature of liquid

initial temperature of liquid

The elements of group 17 are called:

Choose an answer

Carbon family

Noble gases

Alkaline earth metals

Halogen family

D-block consists of:

Choose an answer

4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

Cathode rays are actually

Choose an answer

Electrons

Protons

Neutrons

Photons

Which one of the following will not react with dilute HCI?

Choose an answer

Sodium

Potassium

Calcium

Carbon

Which one is not a property of electrolytic cell?

Choose an answer

It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

Which one of the following pair has the same mass?

Choose an answer

1 mole of CO and 1 mole of N₂

1 mole of CO and 1 mole of CO₂

1 mole of O₂ and 1 mole of N₂

1 mole of O₂ and 1 mole of CO₂

Binary compounds of oxygen such as CO2 and SO2 were names as acids by;

Choose an answer

Jabir Bin Hayan

Lavoisier

Al- Jahiz

Sir Humphrey Davy

Which types of reaction speed up gradually?

Choose an answer

Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

The waste products driven out because of the combustion of fossil fuels.

Choose an answer

Primary pollutant

Secondary pollutant

Tertiary pollutant.

None of them

Which one of the ore of copper?

Choose an answer

Copper glance

Chalcopyrite

Both a and b

None of these

Wood contain the amount of carbon.

Choose an answer

70%

80%

60%

40%

Main component of Natrual gas.

Choose an answer

CH₃

CH₄

C₂H₆

C₂H₂

Temporary hardness in water can he removed by.

Choose an answer

Boiling Method

Using washing soda

Using sodium zeolite

All of them

The alkanes consisting of C₅ to C₁₀

Choose an answer

gases

liquids

solid

plasma

Sindh alkalies limited was established near Karachi in.

Choose an answer

1965

1966

1970

2000

Which hydrocarbon decolorizes the pink colour of acidic solution of potassium permanganate?

Choose an answer

CH₄

C₂H₄

C₂H₆

C₂H₅

Which base is more corrosive?

Choose an answer

NH₄OH

NaOH

Ca(OH)₂

AL(OH)₂

Guldberg and waage put forward law of mass action in:

Choose an answer

1860

1869

1870

1879

Which one of the following is not an air pollutants?

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Nitrogen

Carbon dioxide

Nitrogen oxide

Ozone

Which one of the diseases causes severe diarrhea and can be fatal?

Choose an answer

Jaundice

Dysentery

Cholera

Typhoid

Word "acid" derived from:

Choose an answer

Urdu

English

Latin

Greek

Pitch is black residue of.

Choose an answer

Coke

Coal tar

Coal

Coal gas

Eye inflammation is caused by the deficiency of vitamin.

Choose an answer

Vitamin D

Vitamin C

Vitamin B

Vitamin A

Which gas is not present in atmosphere?

Choose an answer

Nitrogen

Oxygen

Helium

Carbon dioxide

Reaction which have comparable amount of reactants and products at equilibrium state have.

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Very small Kc value

Very large Kc value

Moderate Kc value

None of these

Which of the following can be used as a fuel?

Choose an answer

Methanol

Ethanol

Bio-diesel

All of them

Composition of carbon in kerosene oil is.

Choose an answer

C₁₀-C₁₂

C₁₂-C₁₂

C₁₆-C₁₈

C₃₀-C₃₀

The process of removal of gangue form the ore is technically known as:

Choose an answer

concentration

purification process

metallurgy

refining

Rapid growth of algae in water bodies in because of detergent having.

Choose an answer

Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

^{RNA consists of}

Choose an answer

Ribos

Pentose

Hexose

Trioses

Which one is triglyceride.

Choose an answer

carbohydrates

Proteins

Lipids

Vitamins

The branch of chemistry which deals with the study of hydrocarbons and their derivatives is known as.

Choose an answer

Organic chemistry

Inorganic chemistry

Biochemistry

Nuclear chemistry

Acids turn

Choose an answer

Blue litmus red

Red litmus blue

Blue litmus green

Blue litmus blue

The surface tension of water is:

Choose an answer

very low

moderate

high

zero

Which one of the following statements is not correct about active mass?

Choose an answer

Rate of reaction is directly proportional to activ emass.

Active mass is taken in molar concentration

Active mass is represented by square brackets

Active mass means total mass of substances.

When Bronsted and Lowry put forward acid base concept?

Choose an answer

1913

1923

1933

1943

Which one of the following is testeless?

Choose an answer

Sucrose

Glucose

Fructose

Starch

Which is the natural sugar found in starchy food.

Choose an answer

Pentose

Dextrose

Hexose

All of them

Which is a Lewis base?

Choose an answer

H⁺

NH₄

BF₃

AlCl₃

When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:

Choose an answer

Cu2S + Cu2O

Cu2O +FeS

Cu2S + FeS

FeO + SO2 + Cu2S

Imperial chemical industries was established in.

Choose an answer

1942

1944

1950

1990

Acid reacting with metal sulphides, liberate gas.

Choose an answer

Oxygen

Hydrogen

Hydrogen Sulphide

Hydrogen Oxide

The freezing point of water is:

Choose an answer

10 ^oC

100^oC

0^oC

46^oC

Carbon content in coke is.

Choose an answer

80%

98%

70%

88%

Coal tar contains compounds

Choose an answer

Benzene

Phenol

Toluene

All

Which helps in lowering of cholesterol level?

Choose an answer

Vitamin

Fiber

Carbohydratres

All of them

The impurities associated with the minerals are known as:

Choose an answer

Metallurgy

Ores

Gangue

Compounds

Halogenation of methane on the presence of diffused sunlight takes place.

Choose an answer

Only in one step

Slowly in one step

Freshly in two steps

In a series of four steps

According to Lewis concept, acid is a substance which.

Choose an answer

Can donate protons

Can donate an electron pair

Can accept protone

Can accept electron pair

How many % age of nitrogen present in air by volume?

Choose an answer

70%

75%

78%

80%

Carbohydrates are synthesized by plants through.

Choose an answer

Respiration

Photosynthesis

Dehydrateion

Evaporation

Specific Heat capacity of water is about.

Choose an answer

4.0 Jg^-1 K^-1

4.1 Jg^-1K^-1

4.2 Jg^-1K^-1

4.3 Jg^-1K^-1

Such reaction which can be made proceed in either direction depending upon the condition:

Choose an answer

simple reaction

reversible reaction

irreversible reaction

chain reaction

Chemical formula of copper glance is:

Choose an answer

Cu2O

Cu2S

CuFeS2

CuSO4

The percentage of potable water on earth is.

Choose an answer

2%

0.2%

0.02%

0.002%

Sodium zeolite is resin of:

Choose an answer

NaAl(SiO₃)₂

KAl(SiO₃)₂

LiAl(SiO₃)₂

RbAl(SiO₃)₂

Organic compounds contain:

Choose an answer

ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Mercury poisoning cause:

Choose an answer

neurological damage

high blood pressure

kidney damage

gastro

Lactose and maltose are;

Choose an answer

monosaccharides

disaccharides

trisaccharides

tetrasaccharides

Building and Monuments lose their beauty and shine due to

Choose an answer

U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

Open chain compounds are also called:

Choose an answer

aliphatic compounds

alicyclic compounds

aromatic compounds

hydrocarbons

Which diseases cause by the deficiency of vitamin E?

Choose an answer

Rickets

Anemia in babies

Scurvy

Night blindness

Which of the following is tasteless?

Choose an answer

Starch

glucose

Fructose

Sucrose

Which ion cause water hardness?

Choose an answer

Al²

Mg²

Fe²

Na²

Equilibrium constant has no unit when number of moles of reactants and products are:

Choose an answer

same

Different

Both a and b

None of these

Low sugar level in human body result in.

Choose an answer

Hyperglycemia

Hypoglycemia

Anemia

All of them

Hook worm infects.

Choose an answer

Liver

Small intestine

Large intestine

Stomach

Temporary hardness is because of.

Choose an answer

Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Which is used to remove the grease stains from clothes?

Choose an answer

NaOH

KOH

Al(OH)₃

NH₄OH

Thousand of amino acids polymerize to form.

Choose an answer

Carbohydrates

Proteins

Lipids

Vitamins

The unit of molar concentration:

Choose an answer

mol. dm^-2

mol. dm^-1

mol. dm

mol. dm^-3

Alkanes give reaction only

Choose an answer

Addition

Decomposition

Substitution

Displacement

Water molecule has a structure:

Choose an answer

Ionic

Non polar

Tetrahedral

Polar

The strone heating of coal in retorts in the absence of air is called.

Choose an answer

Fractional distillation

sublimation

Roasting

Destructive distillation

The % age of carbon in coke is

Choose an answer

60

70

90

98

At equilibrium state, when reaction cases to proceed, it is called:

Choose an answer

equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

The functional group -COOH is found in.

Choose an answer

Aldehydes

Esters

Carboxylic acids

alcohols

Matte is a mixture of:

Choose an answer

FeS and CuS

Cu₂O and FeO

Cu₂S and FeS

CuS and FeO

Dehydration of alcohols can be carried out with.

Choose an answer

NaOH

KOH

H₂SO₄

HCl

The number of carbon atoms present in gasoline or petrol.

Choose an answer

5-10

6-10

7-10

8-10

The depletion of which gas results in the death of aquatic life.

Choose an answer

Oxygen

Carbon di oxide

Boath of them

Nome of them

What is the POH of a 0.02 M Ca(OH)₂?

Choose an answer

1.698

1.397

12.31

12.61

Acute lead poisoning causes dysfunction of.

Choose an answer

Kidney

Liver

CNS

All of them

The residual oil is heated above 400 c to produce.

Choose an answer

Lubricants

Paraffin wax

Asphalt

All

Cholera is caused by

Choose an answer

Protozoa

Virus

Bacteria

Fungi

General formula of carbohydrates is.

Choose an answer

C_n(H₂O)₆

C_n(H₂O₂)₆

C_n(H₃O)₆

C_n(H₂O₃)₆

Which gas is evolved when acids react with carbonates and bicarbonates?

Choose an answer

Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

K_c is always equal to

Choose an answer

Rf/Rr

Kf /Kt

Kf/Kr

Rr/Rt

General formula of alkenes.

Choose an answer

C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

Deficiency of Vitamin E causes.

Choose an answer

rickets

Scurvy

Anemia in babies

Night blindness.

The meaning of latin word acidus is.

Choose an answer

Sweet

Tasteless

Salty

Sour

White viscous fluid present in an egg is.

Choose an answer

Proten

Fats

Vitamin

Carbohydrates.

The chemical used in Clark's method is:

Choose an answer

CaO

slaked lime(Ca(OH)s)

washing soda

sodium zeolite

For which reaction Kf is the rate constant?

Choose an answer

Forward reaction

Backward reaction

Upward reaction

Downward reaction

Which one of the following is a synthetic fiber:

Choose an answer

cotton

wool

nylon

silk

The layer above troposphere extend upto 50 kilometers called.

Choose an answer

Mesosphere

Hydrosphere

Stratosphere

Thermosphere

when a system is in equilibrium state or in dynamic equilibrium state.

Choose an answer

Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

The strong heating of coal in the absence of air is called.

Choose an answer

Carbonization

Destructive distillation

Fractional distillation

All

Which one of the following diseases causes liver inflammation?

Choose an answer

Typhoid

Jaundice

Cholera

Hapatitis

Soda lime is a mixture of..

Choose an answer

CaCl, + KOH

NaOH + CaO

NaOH + CaCl₂

Ca(OH)₂ + CaO

Phenolphthalein produces red colour in

Choose an answer

Acid

Base

Both a and b

None of these

Molecular formula of butane is

Choose an answer

C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

Marsh gas is mostly consisted of.

Choose an answer

Butane

Propane

Ethane

Methane

____________ is synthetic fiber.

Choose an answer

Cotton

Woal

Nylon

Silk

Such reationsin which reactants and products are sufficient in quantities the Kc value of equilibrium state will be

Choose an answer

Very small

Very large

Moderate

None of these

In the troposphere (lowest layer), the temperature decreases form 17°C to;

Choose an answer

-58°C

-93°C

-61°C

-49°C

Denaturing of protein is caused by.

Choose an answer

Heating

Changing pH

Both of them

None of these

Which one of the following organic compound is found is gasoline?

Choose an answer

C₂H₄

C₃H₈

C₇H₁₀

C₁₂H₂₆

Which protect our muscles from cramping?

Choose an answer

Carbohydrats

Vitamins

Lipids

Proteins

Alkanes are least reactive compounds because they are.

Choose an answer

Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

Acid rain damages the building it is due to reaction on.

Choose an answer

Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxilat

Dehydrohalogenation takes place in the presence of .

Choose an answer

NaOH aqueous

Alcoholic KOH

Aqeous KOH

Alcoholic NaOH

Temporary hardness is because of .

Choose an answer

Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

The % age of nitrogen and oxygen in our atmosphere is:

Choose an answer

80

90

95

99

Which hydrocarbon molecule would have no effect on the aqueous solution of bromine?

Choose an answer

CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

At the height 880120 km from earth's surface is.

Choose an answer

Troposphere

Mesosphere

Stratosphere

Thermosphere

Which gas is used to prepare ammonia?

Choose an answer

N₂

O₂

Cl₂

S

Swimming pools are cleaned by the process.

Choose an answer

Chlorination

Hydrogenations

Saponification

None of them

Benzene is formed by the polymerization of.

Choose an answer

Alkene

Alkane

Acetylene

Methane.

The percentage of ocean in world water is.

Choose an answer

50%

67%

97%

25%

How many units are in Pakistan for manufacturing of Urea.

Choose an answer

3

6

9

12

The reaction goes from left to right , if:

Choose an answer

Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

Water has a maximum density at .

Choose an answer

10^oC

0^oC

4^oC

100^oC

Triglycerides are fatty acids.

Choose an answer

Unsaturated

Saturated

Both of them

None of them

The order of reactivity of hydrogen halides with alkenes is:

Choose an answer

HI>HBR

HBr>HI

HCl>HBr

HBr>HCl

Which gas is used to manufacture king of chemicals sulphuric acid?

Choose an answer

N₂

O₂

Cl₂

S

The substances formed during the chemical reaction are called.

Choose an answer

Product

Reactants

Radicals

Element

In which one of the following is a substitution reaction?

Choose an answer

Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

The characteristics of reversible reactions are the following except:

Choose an answer

Products never recombine to form reactants.

They never complete

The proced in both ways

They have a double arrow between reactants and products.

Latin word 'Acidus' means:

Choose an answer

sweet

salty

sour

bitter

Which one of the following cannot by hydrolyzed?

Choose an answer

Polysacchrides

Monosacchrides

Oligosacchrides

All of these

Salt makes the water permanently hard.

Choose an answer

CaSO₄

Ca(HCO₃)₂

NaHCO₃

NaCO₃

Cause of diarrhoea among following is:

Choose an answer

Diarrhea

Cholera

Cryptosporidium

Typhoid

Natural source of citric acid is:

Choose an answer

Rancid butter

Fats

Lemon

Sour milk

Building are being damaged by acid rain because it attacks.

Choose an answer

Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxalate

Uric acid is found in

Choose an answer

Urine

Fats

Apple

Grapes

Which of one of the following is used as as fumigant:

Choose an answer

Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

Petroleum is refined by

Choose an answer

Destructive distillation

Fractional distillation

Simple distillations

Dry distillation

There are ____________ types of salts.

Choose an answer

2

3

6

8

Atmosphere is divided into;

Choose an answer

3 regions

4 regions

5 regions

6 regions

Sodium carbonate is manufactured by.

Choose an answer

Haber's process

Ostwald's process

Solvay's process

All

Catalyst used in Haber's process is:

Choose an answer

Ni

Fe

Cu

Zn

Catalytic converters convert.

Choose an answer

CO to CO₂

N₂ to NO

CO₂ to CO

N₂to NO₂

Acid rain affects the aquatic life by clogging fish gills because of:

Choose an answer

Lead metal

Chromium metal

Mercury metal

Aluminium metal

How much amount of sunlight reaches up to earth and absorbed:

Choose an answer

26%

32%

50%

18%

Concentration is a separating technique in which mineral is separated from.

Choose an answer

Gangue

Silicates

Aluminates

All

Which is not an air pollutant?

Choose an answer

CO₂

CO

SO₂

NH₃

Sum of PH and POH of a solution is:

Choose an answer

7

14

16

18

Inland water includes.

Choose an answer

River

Lakes

Streams

All of them

Sea water in unfit for drinking purpose die to the presence of.

Choose an answer

Salts

Algae

Fishes

All of them

99% of atmosphere consists of .

Choose an answer

N₂and H₂

N₂and O₂

N₂and CO₂

O₂and CO₂

Lactic acid founds in:

Choose an answer

Citrus fruits

Sour milk

Rancid Butter

Apple

The percentage of sun light absorbed by atmospheric gases is.

Choose an answer

2%

10%

18%

25%

Concentration of the copper ore is carried out by:

Choose an answer

Calcinations

Roasting

Forth flotation

Distillation

Carbohydrates are synthesized by plants through photosynthesis process which requires the following except.

Choose an answer

CO₂ and water.

Sunlight

O₂

Chlorophyll

Protein is not found in:

Choose an answer

Muscles

Skin

Cotton

Hair

pH of acid rain is:

Choose an answer

7-5

6-7

1-2

4-5

The elements that do not conduct heat and electricity are called.

Choose an answer

Metallurgy

Non metal

Metalloid

Alloy

Temporary hardness is removed by adding.

Choose an answer

Quick lime

Slaked lime

Lime stone

Lime water.

Global warming is because of.

Choose an answer

Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

Some orchids attracts bees for pollination by producing.

Choose an answer

alkanes

almenes

alkynes

all the above.

Infrared radiation emitted by the earth are absorbed by?

Choose an answer

CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

Glucose is:

Choose an answer

Hexabydroxy aldehyde

Hexahydroxy ketone

Polyhydroxy aldehyde

Pentahydroxy ketone.

Dynamic means, reaction is:

Choose an answer

In forward direction

Stop

In reverse direction

Still continuing.

Oxidation of ethene with KMnO₄produces.

Choose an answer

oxalic acid

glyoxal

ethene glycol

Propene glycol

A base is a substance which neutralizes an acid which of these substances is not a base?

Choose an answer

Aqueous ammonia

Sodium chloride

Sodium Hydroxide

Calcium Hydroxide

Traces of acetylene are present to coal gas about.

Choose an answer

0.06 %

0.08%

1.1 %

90%

A conjugate acid is a specie formed by accepting a.

Choose an answer

Proton

Electron pair

Neutron

Electron

Which one is used for alkaline batteries?

Choose an answer

NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Who proved that the presence of hydrogen as the main constituent of all acids.

Choose an answer

Lavoisier

Humphrey Davy

Dalton

Arrhenius

Which gas is in involved in ozone depletion?

Choose an answer

Nitrogen

CFC's

Chlorine

All of them

Which one of the following gases is used to destroy harmful bacteria in water.

Choose an answer

Iodine

Chlorine

Fluorine

Bromine

Ozone depletion was first noticed is.

Choose an answer

1970's

1980's

1990's

1960's

In chemical reaction , the substances that combine are called.

Choose an answer

Reactants

Products

Equlibrium

Numerator

Bond energy of C-C is.

Choose an answer

200 KJmol^-1

452 KJmol^-1

300 KJmol^-1

355 KJmol^-1

Formula of soda ash is.

Choose an answer

Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

Raw materials used in Solvay's process.

Choose an answer

Brine

Lime stone

Ammonia gas

All

The functional group- COOH is found in

Choose an answer

Carboxylic acid

aldehydes

alcohals

easter

Which of the following in insoluble in water.

Choose an answer

Benzene

NaCl

KCl

All of them

For a reaction between PCL₃ and Cl₂ to form PCl₅ the units of Kc are:

Choose an answer

Mol dm^-3

Mol^-1 dm^-3

Mol^-1dm³

Mol dm³

Which one of the following statements about glucose and sucrose is incorrect.

Choose an answer

Soluble in water

Naturally occuring.

Carbohydrates

Disaccharides

Acetic acid is a weak acid because it.

Choose an answer

Is used in cooking and flavouring food.

Has very low pH

Is not fully ionized

Does not contain any hydrogen ions.

An equilibrium is achievable only in a:

Choose an answer

big system

small system

open system

closed system

The plant use

Choose an answer

Carbon di oxide

Oxygen

Nitrogen

Sulphur

The value of equilibrium constant (Kc) depends only on:

Choose an answer

temperature

Pressure

concentration

density

Which disease cause when humans use water of industrial effluents.

Choose an answer

Cancer

Asthma

Jaundice

cholera

Which gas is used to destroy harmful bacteria in water?

Choose an answer

Iodine

Chlorine

Flourine

Bromine

The % age of carbon is coal is

Choose an answer

40-60

50-70

40-80

40-90

In hydrogenation of vegetable oil catalyst employed is.

Choose an answer

Ni

Pt

ZnO

Cr₂O₃

Which of one the following is Lewis base?

Choose an answer

BF3

H+

NH3

Ag+

Water molecule show structure.

Choose an answer

Tetrahedral

Trigonal

Pentagonal

All of them

The general formula of carbohydrate is:

Choose an answer

C2n(H2O)

CN(H2O)n

Cn(H2O)2n

C2n(H2O)n

Cause of Night blindness is.

Choose an answer

Deficiency of vitamin B

Deficiency of vitamin A

Deficiency of vitamin D

Deficiency of vitamin E

Calcium carbonate is in water.

Choose an answer

Insoluble

Sparingly

None of them

Soluble

The nitrogen present in urea is used by plants to synthesize.

Choose an answer

Sugar

Proteins

Fats

DNA

Identify which one of the following compounds is a ketron?

Choose an answer

(CH₃)₂ CHOH

(CH₃)₂CHCl

(CH₃)₂CO

(CH₃)₂CHCl

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What is the formula could be of the x:

Choose an answer

C₃H₈

C₆H₁₂

C₄H₁₀

C₂H₁₆

Which one of the following gas has greater retaining capacity?

Choose an answer

O₂

N₂

CO

CO₂

Blonde hair contains compounds of:

Choose an answer

molybdenum

iron

titanium

copper

A substance which can behave as an acid as well as a base is called.

Choose an answer

Acid

Base

Amphoteric

Neutral

Who proposed "Law of mass action"?

Choose an answer

Newton

Boyle

Guldberg and waage

Lavoisier

A product of any Lewis acid base reaction is a single specie called.

Choose an answer

Salt

Water

Adduct

None of these

On which bases froth floatation process take place?

Choose an answer

Density bases

Concentration basis

Watting basis

None of these

Glucose and fructose are.

Choose an answer

Pentose

Triose

Hexoses

None of these

Temporary hardness can be removed by__________.

Choose an answer

Quick lime

Slaked lime

Lime stone

HCl

Vibrious cholera causes.

Choose an answer

Choleera

Dysentery

Fluorsis

Hepatitis

In a Reversible Reaction if Qc = Kc then.

Choose an answer

Reaction is occuring in forward direction

Reaction is occuring in Reverse direction

Equilibrium has been allained

Reaction is not at equilibrium

A strange bitter smell noticed near photo copier machine is of.

Choose an answer

H₂S

SO₂

O₂

O₃

All bases turn red litmus

Choose an answer

Red

Blue

Pink

White

Froth flotation process is used to concentrate.

Choose an answer

Copper ore

Iron ore

Chromium ore

Aluminum ore

Water of crystallization is responsible for.

Choose an answer

Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

Which is simplest alkane?

Choose an answer

CH₄

C₂H₈

C₂H₂

C₂H₄

Percentage of nitrogen in atmosphere is:

Choose an answer

20.94%

78.09%

0.93%

0.03%

How many percentage blister copper is pure?

Choose an answer

95%

75%

98%

100%

The density of water is ................. at 4^oC

Choose an answer

1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

Coal is blackish complex mixture of compounds of

Choose an answer

Carbon

Hydrogen

oxygen

All

Petroleum fraction having composition C₅ to C₇ is.

Choose an answer

Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

The word acid is derived from the.

Choose an answer

Greek word

Latin word

English word

Arabic word.

Which carbohydrate is used directly by muscles for energy?

Choose an answer

Galactose

Lactos

Glucose

Fructose

Citric acid is present in

Choose an answer

Citrus fruits

Sour milk

Rancid butter

Apple

Which is not a heavy metal.

Choose an answer

Cadmium

Lead

Zinc

Murcury

Percentage of carbon in peat is.

Choose an answer

50%

60%

70%

80%

Who put forward the vital force theory?

Choose an answer

Berzelius

Wohler

Dalton

Lavoisier

Which are called paraffines?

Choose an answer

Alkyle

Alkynes

Alkenes

Alkanes

The process of roasting during metallurgy of copper is carried out in a special furnace called.

Choose an answer

Blast furnace

Fire furnace

Bessemer converter

Reverberatory furnace

Temporary hardness is due to the presence of bicarbonates of.

Choose an answer

Calcium

Magnsium

Both of them

None of them

Which is used to manufacture of soap?

Choose an answer

NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Which one of the following is not air pollutant.

Choose an answer

CO₂

CO

NO₂

O₂

Which pollutant is responsible for changing weather?

Choose an answer

Air pollutant

Water pollutant

Soil pollutant

All of them

Temporary hardness of water is removed by adding.

Choose an answer

Ca(OH)₂

NaOH

KOH

CaSO₄

Which gas like a glass wall of g green house:

Choose an answer

CO

O2

CO2

N2

The boiling point of water is.

Choose an answer

100^oC

4^oC

0^oC

25^oC

Which one of the following is not air pollutants?

Choose an answer

N₂

CO

NO₂

O₂

General formula of Alkyl radical is..

Choose an answer

C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-1

C_nH_2n-2

The nature of enzyme is.

Choose an answer

Protein

Vitamin

Fats

Carbohydrate

A sea level the boiling point of water is.

Choose an answer

0^oC

98^oC

100^oC

110^oC

Ethyl butanoate smells like.

Choose an answer

Apple

Pine apple

Lemon

Melon

Hydrogen atoms preset in pentane are.

Choose an answer

10

12

14

16

Which of the following salt is soluble in water.

Choose an answer

NaCl

KCl

Na₂SO₄

All of them

Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.

Choose an answer

Two

Three

Four

Five

Potassium Ferrocyanide is a:

Choose an answer

Normal salt

Mixed salt

Complex salt

Double salt

Which one contains double covalent bound?

Choose an answer

Pentane

Ethylene

Acetylene

All

Jabir Bin Haiyan prepared.

Choose an answer

Nitric Acid

Hydrochloric acid

Sulphueric Acid

All of these

Which one of the following disease causes severe diarrhea and can be fatal:

Choose an answer

Jaundic

Dysentery

Cholera

Typhoid

Dehydrohalogenation of vicinal-dihalides take place in the presence of.

Choose an answer

NaOH

KOH

NaCl

None of these

Chemical formula of hypochlorous acid is.

Choose an answer

HCl

HOCl

H₂CO₃

HF

When NaHCO₃is heated if forms:

Choose an answer

CO₂

Ca(OH)₂

CaCO₃

CaO

Proteins are polymers of.

Choose an answer

Polysaccharide

Oligosaccharids

Amino acid

Nucleic acid

Formation profess of Ammonia by the combination Hydrogen and Nitrogen was given by:

Choose an answer

Dalton

Thomson

Haber

Waage

In irreversible reaction, dynamic equilibrium:

Choose an answer

Never establishes

Establishes before the completion of reaction

Establishes after the completion of reaction

Establishes readily

Which one of the following ion does not cause hardness in water?

Choose an answer

Ca⁺²

Mg^-2

SO^-2

Na⁺

Which one of the following is non- reducing in nature;

Choose an answer

glucose

fructose

starch

sucrose

Which of the following gas is used to destroy harmful bacteria in water.

Choose an answer

Iodine

Chlorine

fluorine

Bromine

Stearic acid present in

Choose an answer

Apple

Fats

Urine

Grapes

Smell of rancid butter is due to the presence of.

Choose an answer

Propanoic acid

Butanoic acid

Acitic acid

Citric acid

Density of water at 4°C is:

Choose an answer

0.976 gem-3

1 gem-3

0.956 gem-3

1.1 gem-3

Chemical formula for urea is:

Choose an answer

NH4CNO

NH4CH

NH2CONH2

NH4CI

A conjugate base is a specie formed by donating a.

Choose an answer

Proton

Electron pair

Neutron

Electron

The most important oligosaccharide is:

Choose an answer

Sucrose

Glucose

Fractose

Maltose

Cause of global warming is :

Choose an answer

CO₂ gas

SO₂gas

NO₂gas

O₂gas

Which one of the following is a fat soluble vitamin?

Choose an answer

A

E

K

All of these

Which of the following is a secondary pollutant.

Choose an answer

CO₂

CO

SO₃

HF

Which type of reactions do not go to completion?

Choose an answer

Irreversible reaction

Reversible reactions

Addition reactions

Decomposition reactions

Which one of the following does not contain proteins.

Choose an answer

In pulses

In Potatoes

In fruits

In eggs

Atmosphere has regions.

Choose an answer

One

Two

Three

Four

Compound of metal exist under earth crust are called.

Choose an answer

Ore

Gangue

Minral

None of these

The reaction will attain the equilibrium if:

Choose an answer

Qc<Kc

Qc > Kc

Qc = Kc

Qc = 0

Number of vitamins in vitamin B complex is.

Choose an answer

10

8

6

12

On which base atmosphere is divided into four regions?

Choose an answer

Change in pressure

Change in rediation

Change in temperature

Change in volume

Substitution reaction is the characteristics of.

Choose an answer

Alkanes

Alkenes

Alkynes

None of these

Which disease cause by deficiency of vitamin D?

Choose an answer

Rickets

Anemia in babies

Scurvy

Night blindness

Tetra saccharides are classified under.

Choose an answer

Monosaccharides.

Oligosaccharides

Polysaccharides

All of them

Which one of the following is a synthetic fibre?

Choose an answer

Cotton

Wool

nylon

silk

Condensed formula of ethane is.

Choose an answer

C₃H₈

C₂H_2n+2

C₂H_2n-2

C_nH_2n+1

Almost all aircrafts fly in:

Choose an answer

troposphere

mesosphere

stratosphere

themosphere

Oxidation of Ethene with KMnO₄ produces.

Choose an answer

Oxalic acid

Glyoxal

Ethene Glycol

Propene glycol

Dilute acid react with carbonates the produce product except _________

Choose an answer

Salt

Water

Carbon di oxide

Hydrogen gases

The coal in which the percentage of carbon is 60%

Choose an answer

Peat

Lignite

Bituminous

Anthracit

The percentage by volume of nitrogen in dry gas is.

Choose an answer

78.09%

20.94%

0.93%

0.03%

Boiling point of alcohol in centigrade is.

Choose an answer

68

78

118

128

Water dissolves Non-ionic compounds by:

Choose an answer

Ion-Ion forces

Dipole forces

Dipole - Dipole forces

Hydrogen Bonding

Extraction of metals from its ores is called.

Choose an answer

Metallurgy

Mining

Griding

All

Percentage of methane present in natural gas is.

Choose an answer

75%

80%

85%

90%

The percentage of water in human body is.

Choose an answer

40%

50%

60%

70%

On hydrolysis sucrose produces one unit of glucose and one unit of.

Choose an answer

Fructose

Starch

Cellulose

None of them

The removal of Mg⁺² and Ca⁺² Ion which are responsible for the hardness of water is called.

Choose an answer

Temporary hardness

Permanent hardness

Water softening

Hydrogen bonding

Which one is homocyclic compound?

Choose an answer

Benzene

Cyclobutane

Cyclohexane

All

The body reactions are catalized by.

Choose an answer

Amino acids

Lipids

Enzymes

Fatty acids

Oxidation of alkenes produce.

Choose an answer

Glyoxal

Glycol

Oxalic acid

Formic acid

How many % age of nitrogen in urea fertilizers?

Choose an answer

40.6

45.6

46.6

50

Which one of the following are amorphous solids?

Choose an answer

Monosacchrides

Oligosaccharides

Polysaccharides

All of them

Coal is the mixture of

Choose an answer

Hydrogen

Methane

Carbon monoxide

All

Which is disaccharide?

Choose an answer

Glucose

Fructose

Sucrose

Starch

Building block of lipids are.

Choose an answer

Fatty acids

Carboxylic acids

Mineral acids

Alcohols

DNA was discovered by

Choose an answer

J .Watson

Funk

Robert brown

Hopkins

Which contains sufficient amount of metal?

Choose an answer

Mineral

Ores

Rocks

Soil

Boiling point of water is:

Choose an answer

0^oC

25^oC

80^oC

100^oC

A saturated solution of sodium chloride is called.

Choose an answer

Brine

Suspension

Colloidal

None of these

Which organ cause to function during Jaundice?

Choose an answer

Liver

Kindney

Stomach

Large intestine.

Which acid is found in sour milk?

Choose an answer

`Formic acid

Lacitc acid

Citric acid

Butric acid

The reactions in which products can recombine to form reactants is called.

Choose an answer

Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

If Qc < Kc the reaction goes in:

Choose an answer

Forward

Reverse

At equilibrium state

None

The 1st organic compound prepared in laboratory.

Choose an answer

Urea

NaCl

Thiourea

Pyridine

Essential components of every living all are.

Choose an answer

Nucleic acids

Enzymes

Lipids

Cell wall

The pH of water containing CO₂ is

Choose an answer

4-6

5.6-6

6-7

7-8

The unit of molar concentration is:

Choose an answer

moldm^-3

moldm⁺³

molcm^-3

molcm⁺³

Aromatic compounds are given this name because of;

Choose an answer

smell they have

slippery touch they have

bitter taste they have

sour taste they have

Blast furnace usually used for the metallurgy of.

Choose an answer

Iron

Copper

Aluminum

Both a and b

Hydrogenation of alkenes and alkynes may be carried out at room temperature in the presence of catalyst:

Choose an answer

Pt or Pd

Ni

Zn

Fe2O3

Which one is the simplest sugar which can not be hydrolyzed?

Choose an answer

Glucose

Sucrose

Starch

Cellulose

The number of carbon atoms present in kerosene oil.

Choose an answer

8-12

9-12

10-12

11-12

Water dissolves non-ionic compound by

Choose an answer

Ion-ion forces

Ion-dipole forces

Dipole -dipole forces

Hydrogen bonding.

Metallurgy involves which of the following steps?

Choose an answer

Mining and enrichment

Reduction

Refining and casting.

All of these

Which one of the followoing is the Hardest coal.

Choose an answer

Peat

Lignite

Bituminous

Anthracite

How many percent of natural gas is consisted of methane.

Choose an answer

60%

70%

80%

85%

Which of the following is a poisonous gas.

Choose an answer

Oxygen

Ozone

Nitrogen

Carbon dioxide

____________ use for ripening of fruits.

Choose an answer

Ethene

Ethane

Ethyne

Propane

Reactions which have comparable amounts of reactants and products at equilibrium state have:

Choose an answer

very small Kc value

Very large Kc value

Moderate Kc value

None of these

What percentage of nitrogen and oxygen is in the atmosphere.

Choose an answer

69%

79%

9%

89%

According to Bronsted and Lowry concept an acid is a substance that can donate.

Choose an answer

Proton

Electron pair

Neutron

Electron

Fructose contain group.

Choose an answer

Ketone

Aldehyde

Alcoholic

Alkyl

Indicators are the

Choose an answer

Inorganic compounds

Organic compounds

Ionic compounds

Covalent compounds

Margarine is produced by adding hydrogen to vegetable oil at.

Choose an answer

2000 ^oC

100^oC

200^oC

1000^oC

When glucose and fructose combine and forms.

Choose an answer

Starch

Cellulose

Sucrose

None of these

Clark's method is used to remove the hardness of water, in this method which is used.

Choose an answer

Ca(HCO₃)₂

Na-Zeolite

Ca-Zeolite

Ca(OH)₂

If Qc > Kc the reaction will be in

Choose an answer

Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

Which one of the following does not contain starch

Choose an answer

Sugar cane

Maize

Barley

Potatoes

Formula of Urea is.

Choose an answer

KCNO

H₂N-CO-NH₂

HN-CO₂-NH

H₃N-CO-NH₃

Ozone id beneficial for us as it:

Choose an answer

absorbs infrared radiations

absorbs ultraviolet radiation

absorbs chlorofluorocarbons

absorbs air pollutants

Which one of these pollutants are not found in car exhaust fumes?

Choose an answer

CO₂

O₃

NO₂

SO₂

Chemical formula of Stearic acid.

Choose an answer

C₁₅H₃₁COOH

C₁₇H₃₅COOH

C₁₅H₃₇COOH

None of them

What is pOH of 0.01 M solution of KOH?

Choose an answer

3

11

2

4

Which is a hereditary material?

Choose an answer

DNA

RNA

Protein

All of them

When the magnitude of Kc is very large in indicates.

Choose an answer

Reaction never go to completion

Reaction is in equilibrium state

Reaction will complete after some time

Reaction has almost to completion

Which gas saves the surface of earth from ultra violet radiation?

Choose an answer

CO₂

CO

N₂

O₃

The pH of acid rain.

Choose an answer

2

3

4

5

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.

Choose an answer

C₃H₈

C₆H₁₂

C₄H₁₀

C₇H₁₆

Which one of the following is manufactured by Solvar's process:

Choose an answer

caustic soda

washing soda

urea

sulphuric acid

In forth flotation process the ore particles are preferentially wetted by:

Choose an answer

water

oil

benzene

petrole

Nucleic acids made up of long chain of.

Choose an answer

Nucleotide

Fatty acids

Amino acid

None of them

Alkalis react with ammonium salt to liberate.

Choose an answer

SO₂

CO₂

NH₃

H₂

Mesosphere has a temperature range.

Choose an answer

17 ^oC - 58^oC

58^oC - 2^oC

2^oC - 93^oC

- 93^oC

The number of carbon atoms present in fuel oil.

Choose an answer

14-18

15-18

16-18

17-18

Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of.

Choose an answer

Ni

Pt

Pd

Both a and b

Chloroform is used for

Choose an answer

Anesthesia

Fever

Link

Toys

Which is present 85% in natural gas?

Choose an answer

Ethane

Propane

Methane

Butane

Which one is Lewis Acid?

Choose an answer

BF₃

AICI₃

FeCl₃

All of these

Active mass is expressed as:

Choose an answer

{ }

[ ]

( )

l l

The ability of carbon atom to form chain is called.

Choose an answer

Isomerism

Catenation

resonance

Condensation

Normaily rain water is weakly acidic because.

Choose an answer

SO₃

CO₂

CO₃

NO₂

Mallic acid is present in

Choose an answer

Apple

Feats

String of bees

Urine

Chalco-Pyrite is an ore of:

Choose an answer

Copper

Silver

Iron

Aluminium

The base which is used in alkaline batteries is.

Choose an answer

NaOH

Al(OH)₂

KOH

Mg(OH)₂

In the bacterial decay, the compound of which element are emitted.

Choose an answer

Sulphur

Carbon

Nitrogen

All of them

Amino acid are linked to each other through.

Choose an answer

Hydrogen link

Ionic link

Gelatin link

Peptide link

When acid react with carbonates and bicarbonates which gas is evolved?

Choose an answer

H2

CO₂

Cl₂

N₂

General formula of carbohydrate is.

Choose an answer

C_n(H₂O)₆

CH

C_nH_2n

C₆H_2nO

A pollutant is a waste material that pollutes.

Choose an answer

Air

Water

Soil

All of them

Who put forward '' the vital force theory''?

Choose an answer

Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

The range of temperature in burning solid waste burning in incinerators is.

Choose an answer

650 ^oC - 1000 ^oC

650^oC - 11000^oC

1000^oC - 2000^oC

650^oC - 1000^oC

5000^oC - 1000^oC

Froth flotation process is used to concentrate the ore on:

Choose an answer

Density basis

Concentration basis

Wetting basis

Magnetic basis

Which type of reactions take place in both directions?

Choose an answer

Addition reactions

Reversible reactions

Irreversibel reactions

Decomposition reactions

Normal rain water is:

Choose an answer

weakly acidic

strongly acidic

weakly basic

strongly basic

A complete reaction is one is which.

Choose an answer

All the reactants convert into products.

All the reactants do not convert into products.

Half reactants convert into products.

Only 10% reactants convert into products.

Process of heating the concentrated ore to high temperature in excess of air is called.

Choose an answer

Roasting

Smelting

Bessemerization

All

Volatility of hydrocarbons deceases with:

Choose an answer

decrease of molecular mass

increase of molecular mass

increase of double or triple bonds

decrease of triple bonds

Which of the following in soluble in water.

Choose an answer

Organic acids

Glucose

Alcohal

All of them

According to Lewis concept a base is a substance which can donate.

Choose an answer

Proton

Electron pair

Neutron

Electron

Ammonical brine is prepared by dissolving ammonia gas in.

Choose an answer

NaCl

CaCO₃

CaCl₂

Na₂SO₄

Which one of the following vitamins is water soluble?

Choose an answer

Vitamin A

Vitamin C

Vitamin D

Vitamin E

Earth has natural systems.

Choose an answer

One

Two

Three

Four

The reaction in which the products can recombine to form reactants are called.

Choose an answer

Reversible reaction

Irreversible reaction

Decomposition

Addition

How many percentage of protein is present in dry weight of animal?

Choose an answer

More then 20%

More then 30%

More then 40%

More then 50%

Which colour of HI is ?

Choose an answer

Orange

Purple

Red

Colourless

Hookworm is a parasite that infects the:

Choose an answer

large intestine

small intestine

stomach

liver

What is the percentage of carbon in anthracite?

Choose an answer

60%

70%

80%

90%

Which part of digestive system glucose absorb.

Choose an answer

Stomach

Liver

Small intestine

Large intestine.

Alkenes are produced in large amounts by cracking of.

Choose an answer

Natural gas

Petroleum

Benzene

xylol

Condensed formula of ethane is

Choose an answer

C₃Cl₈

C₂Cl₆

H₃CCH₃

None of these

A dynamic equilibrium

Choose an answer

Reaction stops to proceed

Amounts of reactants and products are equal

Rate of forward and reverse reaction are equl

Reaction can no longer be reversed.

Methyl butanoate smell like.

Choose an answer

Apple

Mange

Lemon

Grapes

A reverse reaction is that.

Choose an answer

Which proceed from left to high

In which reactants reacts to form products

Which slow down gradually

Which speed up gradually

The stratosphere layer is at height above the earth's surface.

Choose an answer

0-12 km

12-50 km

50-85 km

65-120 km

Enzymes are proteins which have the following properties except.

Choose an answer

They catalyze reaction

They are highly non-spcific

They are highly efficient

They are pro

Which one of the mineral acid.

Choose an answer

HCl

H₂SO₄

HNO₃

All of these

The dynamic equilibrium in irreversible reaction.

Choose an answer

Never establishes

Establishes after completion of reaction

Establishes before completion of reaction

Establishes very soon

Pentahydroxy ketone is called as:

Choose an answer

Glucose

Fructose

Starch

Sucross

In the beginning the rate of reverse reaction is

Choose an answer

Negligible

Moderate

Very fast

Slow

Synthesis of protein is directed by.

Choose an answer

DNA

RNA

Both of them

None of them

How many atmospheric temperature increase every year due to accumulation of CO₂ in air.

Choose an answer

0.03 ^oC

0.05 ^oC

1^oC

2^oC

General formula of Alkane is.

Choose an answer

C₁₀H_2n-2

C₆H₂₆

C₁₁H_2n-2

C_nH_2n-2

Specific heat capacity of water is.

Choose an answer

4.2 KJg^-1 K^-1

4.2 Jg^-1K^-1

2.4 KJg^-1K^-1

2.4 Jg^-1K^-1

The most important disaccharide is .

Choose an answer

Sucrose

Glucose

Cellulose

None of them

___________ is not mineral acid.

Choose an answer

HCl

CH₃COOH

H₂SO₄

HNO₃

Which of following is not conjugate base.

Choose an answer

S^-2

F^-1

Na⁺

SO₄

The source of galactose.

Choose an answer

Fruits

Vegetables

Cereals

All of them

The molecular formula of the first three members of the alkane hydrocarbons are CH_4,C₂H₆ and C₃H₈. What is the molecular formula for the eight alkane member, octane, which is found is petrol?

Choose an answer

C₈H₈

C₈H₁₆

C₈H₁₈

C₈H₂₀

Which is the substitution reaction in the following?

Choose an answer

Halogenation of alkenes

Halogenation of alkynes

Bromination of alkene

Halogenation of alkanes

__________ acid cause acidity of stomach.

Choose an answer

Oxalic acid

Hydrochloric acid

Sulphuric acid

Nitric Acid

The example of heterocyclic compound is.

Choose an answer

Benzene

Hexane

Cyclohexane

Pyridine

Potassium ferrocyanide salt is.

Choose an answer

Normal

complex

Basic

Acidic

Cause of global warming is:

Choose an answer

CO₂gas

SO₂gas

NO₂gas

O₂gas

Which one of the following is polmerized to from benzene?

Choose an answer

ethane

ethene

methane

ethyne

In which of the following groups, oxygen is attached on both sides with carbon atoms?

Choose an answer

Ketone

Ether

Aldehyde

Ester

Traces of acetylene are present in coal gas about.

Choose an answer

0.06 %

0.08%

1.1%

90%

Which element protects teeth from decay?

Choose an answer

Potassium

Fluorine

Sodium

Calcium

the removal of which ion causes water softening.

Choose an answer

Na⁺

Mg²

Li⁺

K⁺

Silicon occurs in the form of

Choose an answer

Silica

Silicates

both a and b

None of these

When the rate of a the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant it is called.

Choose an answer

Chemical equilibrium

Dynamic equilibrium

Static equilibrium

All

Which gas is produce by the electrical lightening of air.

Choose an answer

NO

SO₂

SO₃

CO₂

Which is the main component of natrual gas.

Choose an answer

Methane

Ethane

Propane

Charcoal

Lewis acid-base concept have the following characteristics except:

Choose an answer

formation of an adduct

Formation of a co-ordinate covalent bound

Donation and acceptance of an electron pair

Donation and acceptance of a proton

Vibrious cholera bacteria causes the disease

Choose an answer

Cholera

Diarrhea

Jaundice

Hepatitis

The color of Iodine is:

Choose an answer

Purple

Black

Red

Pink

Lipids are macromolecules made up of.

Choose an answer

Fetty acids

Amino acids

Nucleotides

None of them

The recombination of O and O₂ in mid stratosphere is an

Choose an answer

Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

Monosaccharides consist of:

Choose an answer

2 to 6 carbon atoms

3 to 9 carbon atoms

4 to 10 carbon atoms

10 to 15 carbon atoms

Iron and steel structure are damaged by.

Choose an answer

Carbon monoxide

Sulphur dioxide

Methane

Carbon dioxide

Bases gave taste:

Choose an answer

Bitter

Sweetsh

Sour

Saltish

Which of following is not amphoteric?

Choose an answer

H₂O

NH₃

HCO₃

SO₄

Main component of natural gas is

Choose an answer

Methane

Propane

Butane

Propene

All water soluble metallic oxides have characteristic of:

Choose an answer

acidic

basic

neutral

amphoteric

Basic solution have pH value.

Choose an answer

Less than 7

Greater than 7

equal to 7

None of these

General formula of alkynes is:

Choose an answer

C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-2

How many times the heat capacity of water is greater than that of rocks.

Choose an answer

Two

Three

Four

Six

For reactions having large Kc value, the reaction proceeds to:

Choose an answer

Completion

Equilibrium state

back ward

None of these

A bound formed between two amino acids is:

Choose an answer

Peptide linkage

Covalent bound

Hydrogen bound

Glycosidic linkage

Fossil fuel means.

Choose an answer

Coal

Petroleum

Natural gas

All of them

Lavoisier named binary compounds of oxygen acids in .

Choose an answer

1787

1790

1815

1828

At dynamic equilibrium state:

Choose an answer

Rate of forward reaction≠ Rate of reverse reaction

Rate of forward reaction > Rate of reverse reaction

Rate of forward reaction = Rate of reverse reaction

Rate of forward reaction < rate of reverse reaction

Ionic compounds are soluble in water due to:

Choose an answer

Hydrogen bonding

ion-dipole forces

Dipole-dipole forces

Dipole -induced dipole forces

What gas is the major constituent of troposphere?

Choose an answer

Nitrogen

Oxygen

Hydrogen

Both a and b

At dynamic equilibrium:

Choose an answer

The reactions stops to proceed

The amounts of reactants and products are equal

The speed of the forward is reverse reactions are equal

The reaction can no longer be reversed

The % age of drinkable water on earth is

Choose an answer

2.0%

0.02%

0.2%

5.0%

Which hepatitis is caused by contaminated water?

Choose an answer

Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis D

What is the colour of hydrogen iodide in product?

Choose an answer

Purple

Yellow

Blue

Colorless

The acid which is called king of chemicals.

Choose an answer

Sulphuric Acid

Nitric Acid

Hydrochloric acid

Acetic acid

Functional group of Alcohols is

Choose an answer

-COOH

-C=0

C-O-C

-OH

When the magnitude of Kc is very small in indicates.

Choose an answer

Equilibrium will never establish

All reactants will converted to products.

Reaction will go to completion

The amount of products is negligible

Water molecule had a structure;

Choose an answer

non-polar

polar

ionic

tetrahedral

Which element do not causes toxicity in water?

Choose an answer

Lead

Arsenic

Sodium

Mercury

The % age of carbon is bituminous is

Choose an answer

60

70

80

90

The accumulation of which vitamin causes bone like deposits in the kidney.

Choose an answer

Vitamin D

Vitamin E

Vitamin B

Vitamin A

In a chemical reaction, the substance that combine are called.

Choose an answer

Reactant

Products

Mass

Material

The carbon contents in lignite is.

Choose an answer

80%

50%

60%

70%

According to Bronsted and Lowry concept a base is a substance that can accept.

Choose an answer

Proton

Electron pair

Neutron

Electron

Methyl butanoate smells like;

Choose an answer

a pine apple

an apple

an orange

a lemon

The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is.

Choose an answer

Phosphate

Calcium

Sodium

All of them

Water is a;

Choose an answer

strong electrolyte

non-electrolyte

weak electrolyte

natural compound

The value of K_c depends on.

Choose an answer

Temperature

Pressure

Volume

Atmosphere

Which one of the following is not the characteristics of monosaccharide?

Choose an answer

White crystalline solids

Soluble in water

Hydrolysable

Reducing is nature

Which process is responsible for ascending of water in plants from roots to leaf?

Choose an answer

Condensatin

Transpiration

Capillary action

Evaporation

Composition of carbon in the diesel oil.

Choose an answer

C₇-C₁₀

C₁₀-C₁₂

C₁₃-C₁₅

C₁₅-C₁₈

Concentration is process of:

Choose an answer

Mixting technique

Separating technique

Boiling technique

Cooling techique

Arrhenius put forward acid base concept in.

Choose an answer

1878

1786

1787

1790

Which one of the following is used as jet fuel.

Choose an answer

Kerosene oil

Lubricating oil

Fuel oil

Diesel oil

Molecular formula of butyne is .

Choose an answer

C₄H₆

C₃H₄

C₄H₇

C₄H₈

Which one Ion is not present in salt.

Choose an answer

Metallic cation

Anion of Base

Anion of acid

None metallic anion

Which acid is used for etching glass?

Choose an answer

HF

HCl

HBr

HI

Which is the major effect of global warming?

Choose an answer

Increase in temperature.

Rise in sea level

Melting of glaciers

All of them

The reaction in which the number of moles reactants and products not equal in balance chemical equation the units of Kc for this reactions are

Choose an answer

mol^-2

dm³

mol²

mol dm^-1

Ammonia is prepared by:

Choose an answer

Solvay's process

Haber's process

Floatation process

Bayer's process

The formula which represents the actual number of atoms in one molecule of organic compound is called.

Choose an answer

Molecular formula

Structural formula

Condensed formula

Dot and cross formula

These are safe source of food and energy for body during emergency.

Choose an answer

Proteins

Vitamins

Carbohydrats

Lipids

soap is the sodium salt of long chain.

Choose an answer

Amino acids

Fatty acids

Nucleotides

None of them

Which gas acts as a glass wall of a green house?

Choose an answer

Oxygen

Carbon dioxides

sulphur dioxide

Hydrogen

When CO₂ is passed through the ammonical brine the only salt that precipitates is:

Choose an answer

NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

Which acid is used for food preservation?

Choose an answer

Hydrochloric acid

Benzoic acid

Sulphuric acid

Nitric acid.

The gas used by animals to perform respiration.

Choose an answer

O₂

N₂

SO₂

Cl₂

Marsh gas is mostly :

Choose an answer

ethane

methane

butane

propane

Forest fires and burning of wood emit.

Choose an answer

CO₂

NO₂

SO₂

Cl₂

The organic compound used as drugs to control bleeding are.

Choose an answer

Vitamins

Proteins

Lipids

Glycerides

Malic acid founds in:

Choose an answer

Apple

Fats

Rancid Butter

Oranges

Our planet earth consists of ____________ natural Spheres.

Choose an answer

1

4

6

8

Equilibrium constant value "K" is equal to:

Choose an answer

Kt / Kr

Ki / Kr

Kc / Qc

Qc /Kc

Soda time is a mixture of:

Choose an answer

CaO and NaOH

CaCI2 and NaOH

CaO and ca(OH)2

CaCI2 and KOH

When NaHCO₃ is heated it forms.

Choose an answer

CO₂

Ca(OH)₂

CaCO₃

CaO

Swimming pools are cleaned by a process:

Choose an answer

Hydrogenation

Bromination

Chlorination

Nitration

How many % age of urea is used as fertilizers?

Choose an answer

80%

90%

95%

98%

By the increase in the concentration of CO₂ in air.

Choose an answer

Decrease in heat energy

Increase in heat energy.

Heat energy remains same

None of them

Which one is not an Arrhenius base?

Choose an answer

NaOH

KOH

Ca(OH)₂

NH₃

Olefins is a Latin word meaning:

Choose an answer

inert

less reactive

oil forming

most reactive

Just above the Earth's surface is

Choose an answer

Mesosphere

Stratosphere

Theremosphere

Troposphere

Blonde hair contains compound of.

Choose an answer

Iron

Copper

titanium

Molybdenum

Acetic acid is used for:

Choose an answer

Elching designs

Clearing metals

Flavouring food

Making explosives

Law of Mass Action was put forward by:

Choose an answer

G.N.Lewis

Lowry

Arrhenius

Gulbderg and Waage

One H₂O molecule can form hydrogen bonding with how many other H₂O molecules?

Choose an answer

One

Two

Three

Four

Water become hard because of:

Choose an answer

Ca+2

Mg+2

SO-24

all of these

Brown hair contains.

Choose an answer

Iron compound

Copper compound

titanium compound

Both a and b

Which salt is used for the manufacture of detergents, pulp and paper?

Choose an answer

NaCl

Na₂CO₃

Na₂SiO₃

NaCl

The ability of carbon atoms to form chains or ring called.

Choose an answer

Hydrogenation

Chlorination

Cantenation

Halogenation

Which of following dehydration of alcohols take place:

Choose an answer

NaOH

KOH

H₂SO₄

HCl

Dichloromethane reacts with halogens in the presence of diffused sun light and produces

Choose an answer

Carbon tetrachloride

Chloroform

Chloromethane

No reaction

The reduction of alkyl halides takes place in the presence of.

Choose an answer

Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

Natural gas contains.

Choose an answer

Methane

Ethane

Propane

All

Ozone is an allotropic form of

Choose an answer

Carbon

Oxygen

Sulphur

Phosphorous

Arrhenius presented his concept about acids and bases in.

Choose an answer

1785

1787

1923

1930

Chalco-pyite is an ore of:

Choose an answer

iron

aluminium

silver

copper

The strong heating of coal in retoris in the absence of air is called.

Choose an answer

Fractional distillation

Sublimation

Roasting

Destructive distillation

Example of pest is

Choose an answer

Weeds

Herbs

Insect

All of them

Which acid used for food preservation?

Choose an answer

H₂SO₄

HNO₃

HCl

CH₃COOH

All acids turn blue litmus.

Choose an answer

Red

Blue

Pinck

White

The color of Fe(OH)₂ ppt is.

Choose an answer

White

Brown

Muddy green

Blue

Ozone layer is not found is

Choose an answer

Upper stratosphere

Mid stratosphere

Lower stratosphere

All of them

Which help to keep the bowel functioning property

Choose an answer

Dietary fiber

Vitamins

Lipids

Carbohydrates

Global warming causes rising of the sea level. The cause of global warming is.

Choose an answer

CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

Example of complex salt is.

Choose an answer

Zinc sulphate

Potash alum

Potassium ferrocynide

Sodium Phosphate

The percentage of SO₂released by the combustion of coal and petroleum product.

Choose an answer

40%

60%

70%

80%

Almost all air crafts fly in which reion?

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

Which disease is caused by polluted water.

Choose an answer

Cholera

Typhoid

Diarrhea

All of them

When bromine water is added to acetylene its red-brown colour is changed into:

Choose an answer

red

green

violet

discharged

Which one of the following salts makes the water permanent hard.

Choose an answer

NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

What one of the following does not contain protein?

Choose an answer

Pulses

Potatoes

Beans

Eggs

Formula of Potassium ferrocyanide.

Choose an answer

K₄[Fe(CN)₆]^-4

K₃[Fe(CN)₄]^-3

K₂[Fe(CN)₆]^-4

K₄[Fe(CN)₅]^-4

General formula of Alkynes is.

Choose an answer

C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-2

C_nH_2n-2

About 99% atmosphere's lies within:

Choose an answer

30 kilometre

35 kilometre

15kilometre

11 kilometre

Neurological damage is caused by the poisoning of.

Choose an answer

Lead

Cadimium

Mercury

All of them

The smell of photocopies machine is due to the presence of.

Choose an answer

Chlorine gas

Neon gas

Helium gas

Ozone gas.

Dextrose is a crystallized:

Choose an answer

sucrose

lactose

glucose

fructose

The process which convert vegetable oil into banaspati ghee called.

Choose an answer

Hydrogenation

Halogenation

a and b

None of these

The ability of carbon atoms to form chains is called.

Choose an answer

Isomerism

Catenation

Resonance

Condensation

In laboratory urea was prepared by

Choose an answer

Wohler

Rutherford

Berzelius

Dalton

Which salt is used as a table salt?

Choose an answer

NaCl

Na₂CO₃

Na₂SiO₃

NaCl

The solid particle deposit on the filter paper during filtratin is called.

Choose an answer

Precipitates

Residue

Crystals

All of them

Oils and fats are esters of large chain fatty acids with.

Choose an answer

Glycogen

Glucose

Starch

Glycerol

The number of carbon atoms present in diesel oil.

Choose an answer

10-15

11-15

12-15

13-15

Which disease causes bone and tooth damage?

Choose an answer

Fluorosis

Hepatits

Cholera

Jaundice

Which of the followings is a disaccharide?

Choose an answer

Glucose

Fructose

Sucrose

Starch

Bister copper is pure about;

Choose an answer

70%

80%

90%

98%

Which metal present in acid rain affect the aquatic life by clogging fish gills?

Choose an answer

Lead

Chromium

Aluminium

Mercury

Which one of the following diseases severe diarrhea and can be fatal?

Choose an answer

Joundice

Cholera

Dysentery

Typhoid

Eggs oils and fats contain vitamin .

Choose an answer

A

B

C

D

When the magnitude of Kc is very small it indicates.

Choose an answer

Equilibrium will never establish

All reactants will be converted to products.

Reaction will go to completion

The amount of products is negligible

Which gas in produced during ripening of bnabanas.

Choose an answer

Methane

Ethene

Acetylene

Carbon dioxide

Maltose is commonly found in .

Choose an answer

Cereal

Milk

Cotton

Honey

Which one of the following species is not amphoteric?

Choose an answer

H₂O

NH₃

HCO₃

SO₄

Effects of ozone depletion are following except the one.

Choose an answer

Increases infectious diseases

Increases crops production

Can cause skin cancer

Can cause climatic changes.

The energy provided by carbohydrates in per gram.

Choose an answer

17 KJ

21 KJ

35 KJ

10 KJ

The process by which water rises up from the roots of plants to leaves is called.

Choose an answer

Photosynthesis

Respiration

Surface tension

Capillary action

Dehydrohalogenation take place in the presence of.

Choose an answer

Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

About 99% of atmospheric mass lies in.

Choose an answer

35 km

30 km

15 km

16 km

Water which produces good lather with soap is called.

Choose an answer

Soft water

Hard water

Heavy water

All of them

Gelatin protein is found in.

Choose an answer

Blood

Skin

Heart

Bones

Which pollutant is not found in car exhaust gases?

Choose an answer

CO

O₃

NO₂

SO₃

Chemical formula of chloroform is :

Choose an answer

CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

Conversion of wood into coal is called.

Choose an answer

Carbonization

Destructive distillation

Fractional distillation

All

Night blindness is because of deficiency of:

Choose an answer

Vitamin A

Protein

Vitamin C

Vitamin D

pH of neutral solution is always.

Choose an answer

6

5

7

10

At the time of partition, How many industries wee present in Pakistan.

Choose an answer

30

32

34

40

If an organic compound has 4 carbon atoms, all singly bonded, it will have the following characteristics except one.

Choose an answer

It will be saturated hydrocarbon

It will hav 8 hydrogen atoms

Its name will be n-butane.

It will be least reactive.

Ethylene is present is natural gas sometimes to the extent of .

Choose an answer

10%

20%

30%

40%

Which gas is also known as life gas for plants.

Choose an answer

CO

CO₂

O₂

NO₂

Infrared radiations emitted by the Earth are absorbed by.

Choose an answer

CO₂ and H₂O

N₂ and O₂

CO₂and N₂

O₂and CO₂

The formula of ozone is.

Choose an answer

O₂

O₃

O

CO

Atmospheric region found between 50-58 km from the earthis.

Choose an answer

Thermosphere

Stratosphere

Mesophere

Thermosphere

Carbon Tetra chloride is used in .

Choose an answer

Fertilizer

Dry cleaning

Metallurgy

Anesthesia

Which one of the following is not a fraction of petroleum?

Choose an answer

Kerosene oil

Diesel oil

Alcohol

Petrol

The reaction between an acid and a base produces.

Choose an answer

Salts and water

Salt and gas

Salt and an acid

Salt and an base

The value of constant of ionic product of water Kw at 25 C.

Choose an answer

1.0 x 10^-4

1.0 x 10¹⁴

1.0 x 10^-4

1.0 x 10⁴

Mg²⁺ and Ca²⁺ ions react with soap to form calcium and magnesium salts of fatty acids called.

Choose an answer

Gelatin

Scum

Paste

None of them

Ethylene glycol can be prepared with the reaction of KMnO₄ and _____

Choose an answer

CH = CH

CH₃ - CH₃

CH₃CH₂CH₃

CH₂= CH₃

A reaction between an acid and base produce.

Choose an answer

Salt and water

Salt and gas

Salt and acid

Salt and bases

What is pOH of 0.01 M solution of HCl?

Choose an answer

1

4

12

13

Carbon monoxide is harmful to use because it:

Choose an answer

Paralyses lungs

Damages lungs

Reduce oxygen carrying ability of hemoglobin

Make the blood coagulate

The colour of litmus in a strong basic solution become.

Choose an answer

Yellow

Blue

Red

Colourless

At equilibrium state there are possibilities: OR types of chemical equilibrium are.

Choose an answer

1

2

3

4

Concentration of copper are is carried out by process.

Choose an answer

Roasting

Forth floatation

Gravity sepration

Electrostatic separation

Chemical form of gypsum.

Choose an answer

MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

the chemical formula of chalcopyrite is:

Choose an answer

Cu₂S

CuFe₂S

CuS

FeS

Ozone is beneficial for us as it

Choose an answer

Absorb infrared radiation.

Absorb Ultraviolet radiations.

Absorb Chlorofluorocarbons

Absorb Air pollulant

A disease is caused by excess of bile pigments in the blood is.

Choose an answer

Typhoid

Jaundice

Cholera

Dysentery

The heat capacity of water is greater than rocks.

Choose an answer

4 times

5 times

6 times

7 times

Higher concentration of CO causes.

Choose an answer

Fatique

Headache

Both of them

None of them

The reaction in which the products do not recombine to form reactants are called.

Choose an answer

Inversible reactions

Reversible reaction

Decomposition

Addition

_________ acid is used in lead storage batteries as electrolyte.

Choose an answer

CH₃COOH

HCl

HNO₃

H₂SO₄

Alkynes are also called.

Choose an answer

Olefine

Ethene

Paraffins

Acetylenes

Which one the following is more reactive?

Choose an answer

Methane

Ethane

Ethene

Acetylene

Sodium zeolite is naturally occurring reason of .

Choose an answer

NaAl (SiO₃)₂

Na₂CO₃

CaCO₃

Na₂SIO₃

The heat capacity of water is.

Choose an answer

4.2 Jg^-1 K^-1

2.1 Jg^-1K^-1

3.2 Jg^-1K^-1

5.9 Jg^-1K^-1

When a reaction ceases to proceed further , it is called.

Choose an answer

Chemical states

Static state

Physical state

Dynamic equilibrium state

Industrial effluents are highly

Choose an answer

Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

Coal gas is mixture of

Choose an answer

CO and CH₄

CO . CH₄. CO₂

CO, CH₄, H₂

CO, H₂ and CO₂

Alkyl radical is derivative of

Choose an answer

Alkane

Alkene

Alkyne

All

Which is not a character of SO₂

Choose an answer

it is a colourless gas

It has irritating smell

It causes suffocation

It do not form sulphuric acid

Which disease cause liver inflammation?

Choose an answer

Typhoid

Jaundice

cholera

Hepatitis

The water which produces good lather with soap is called:

Choose an answer

soft water

hard water

heavy water

typical water

In shoe polished, which chemical is used.

Choose an answer

Ethanol

Methanol

Carbon black

Formaldehyde

The process by which atmospheric nitrogen is turned into nitrates in the soil is called.

Choose an answer

Nitration

Fixing

Oxidation

Reduction

Which one of these is a saturated hydrocarbon?

Choose an answer

C₂H₄

C₃H₆

C₄H₈

C₅H₁₂

When glucose and fructose combine they produce

Choose an answer

Starch

Cellulose

Sucrose

None of these

Which acid is used for etching designs on copper plates?

Choose an answer

H₂SO₄

HNO₃

HCl

CH₃COOH

Amino acid are the building blocks of .

Choose an answer

Proteins

Carbohydrates

Vitamins

fats

The product of any Lewis acid-base reaction is a single specie called:

Choose an answer

free radical

adduct

molecular ion

conjugate

conjugate base of HCl is:

Choose an answer

HCl^-

CH

Cl

NH₃

Incinerator reduces solid waste into .

Choose an answer

Ash

Flue gas

Heat

All of them

Which one of the following properties of water is responsible for rising of water in plants?

Choose an answer

Specific heat capacity

Viscosity

Excellent solvent action

Capillary action

Which is not a reducing sugar?

Choose an answer

Glucose

Fructorse

Cellulose

All of them

Acids have taste

Choose an answer

Bitter

Seetish

Sour

Saltish

Vitamin B₁ (Thiamin) was discovered by.

Choose an answer

Hopkins

Funk

J.Watson

Davy

Incomplete combustion of alkanes produces.

Choose an answer

Carbon dioxide only

Carbon monoxide only

Carbon monoxide and carbon black

Carbon dioxide and carbon black

The percentage of water in human body is about:

Choose an answer

60%

50%

70%

80%

___________ is not an acid:

Choose an answer

HCl

NH₃

H₂CO₃

H₂SO₄

The sphere just above the Earth's surface is.

Choose an answer

Mescosphere

Stratosphere

Thermosphere

Troposphere

Who was prepared acetic acid in laboratory?

Choose an answer

Berzelius

Wohler

Kolbe

Dalton

Gypsum in water is.

Choose an answer

Sparingly soluble

Insoluble

Highly soluble

None of them

Crude oil is heated to the fractionating furnace upto.

Choose an answer

300 ^oC

350^oC

400^oC

450^oC

You want to dry a gas which one of the following salt you will use?

Choose an answer

CaCl₂

NaCl

CaO

Na₂SIO₃

Which one of the following salts makes the water permanently hard?

Choose an answer

NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Which factor determines the severity of a pollutant?

Choose an answer

Chemical nature

concentration

Persistence

All of them

Which one is not the fraction of residual oil?

Choose an answer

Paraffin wax

Asphalt

Fuel oil

Coke

Human body uses carbohydrates in the form of

Choose an answer

Glucose

Maltose

Fructose

Galatose

At which temperature o water shows mxamimum density.

Choose an answer

0 ^oC

100^oC

4^oC

-4^oC

Such reactions which continue in both directions are called.

Choose an answer

Irreversible

Reversible

Nonreactive

Dynamic

Thermosphere lies beyond.

Choose an answer

Stratosphere

Troposphere

Mesosphere

Biosphere

In the bessemerization process.

Choose an answer

Roasted ore is beated.

Molten matte is removed.

Molten matte is heated

Molten matte is added

Halogenation of methane produces following valuable chemical compounds used as solvents except.

Choose an answer

Carbonterachloride

Chloroform

Carbon Black

Chloromethane

In which of the following groups , oxygen is attached on both sides with carbon atoms.

Choose an answer

Ketone group

Ether group

Aldehyde group

Easter group

The general formula of alkynes is

Choose an answer

C_nH_2n

C_nH_2n+2

C_nH_2n-2

C_n H_2n+1

When bones are heated they give.

Choose an answer

Starch

Gelatin

Fats

Oils

Formula of palmitic acid is.

Choose an answer

C₁₅H₃₁COOH

C₁₂H₃₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

Formula of Methyl alcohol

Choose an answer

CH₅-OH

CH₃-CH₂-OH

All of them

None of these

According to Arrhenius concept acid is a substance which dissociates in aqueous solution to give.

Choose an answer

Hydrogen ions

Hydroxide ions

Both a and b

None of these

When the magnitude of Kc is very large it indicates.

Choose an answer

Reaction mixture consist of almost all products.

Reaction mixture consist of almost all reactants.

Reaction has not gone to completion

Reaction mixture has negligible products.

Which is not a poisonous gas?

Choose an answer

Ozone

Chlorine

Carbon di oxide

All of them

Amont the followign substitution reaction is characteristics of.

Choose an answer

Alkanes

Alkenes

Alkynes

None of these

General formula of alkyl radical is

Choose an answer

C_nH_2n+2

C_nH_2n-2

C_nH_2n+1

C_nH_2n

When crude oil is heated in the fractionating tower:

Choose an answer

Vapour of higher boiling point fraction condense first in the lower part of the tower.

Vapours of lower boiling point fraction condense first in the lower part of tower.

Vapour of higher boiling point condense lather in the upper part of tower.

Vapours of higher boiling point never condense.

Which gas creates suffocation and causes death?

Choose an answer

CO

CO₂

SO₃

SO₂

Conversion of dead plants into coal by the action of bacteria and heat is called.

Choose an answer

Carbonization

Catenation

Hydrogenation

Cracking

The colour of litmus paper in strong acidic solution.

Choose an answer

Red

Blue

Yellow

Colourless

Monosaccharide consists of number of carbon atoms.

Choose an answer

2 to 4

4 to 8

3 to 9

5 to 10

Which is Pentahydroxy aldehydes of the following?

Choose an answer

Starch

Glucose

Fructose

Sucrose

Permanent hardness is removed by adding.

Choose an answer

Na₂ zeolite.

Soda lime

Lime water

Quick lime

The end product of oxidation of acetylene is .

Choose an answer

Oxalic acid

Glyoxal

Glycol

None of these

The color of hydrogen Iodide is:

Choose an answer

Colourless

Black

Red

Pink

Carbon black is used in the manufacture of.

Choose an answer

Dry cleaning

Shoe polishes.

Fertilizer

None of these

Which of the following is fat soluble vitamin?

Choose an answer

Vitamin A

Vitamin E

Vitamin K

All of these

Which is not a part of flue gas?

Choose an answer

Furans

Dioxins

HCl

H₂SO₄

Which of the following is reducing sugar.

Choose an answer

Glucose

Fructose

Sucrose

Starch

Ammonia is prepared by the process .

Choose an answer

Ostwald

Haber

Clark

All

Formula of acetaldehyde is:

Choose an answer

Molecular formula of stearic acid is.

Choose an answer

C₁₅H₃₁ COOH

C₁₂H₁₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

The lives of aquatic plants and animals are indirectly related to concentration of dissolved ------ in water:

Choose an answer

hydrogen

oxygen

chlorine

nitrogen

The lives of aquatic plants and animals are indirectly related to concentration of dissolved gas in water.

Choose an answer

Nitrogen

Hydrogen

Oxygen

Carbon

Guldberg and waage out forward law of mass action in:

Choose an answer

1889

1879

1869

1859

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

Choose an answer

no unit

mol-2 dm6

mol dm3

mo-2 dn

Which one of the following is not faction of crude oil.

Choose an answer

Paraffin wax

Asphalt

Fuel oil

Petroleum coke

Which one is heterocyclic compound?

Choose an answer

Benzene

Cyclobutane

Thiophene

Nephthalene

Out of twenty how many amino acids can by synthesized by human body?

Choose an answer

Five

Ten

Seven

Twelve

A base is a substance which neutralizes and acid. Which of these substances is not a base?

Choose an answer

aqueous ammonia

Sodium chloride

Sodium carbonate

Calcium oxide

Which one contains triple covalent bond?

Choose an answer

Pentane

Ethylene

Acetylene

All

Rapid growth of algae in water bodies is because of detergent having.

Choose an answer

Carbonate salts.

Sulphonic acid salts.

Sulphate salts.

Phosphate salts.

Petroleum fraction having composition C₇to C₁₀IS called

Choose an answer

Petroleum gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

A strange bitter smell noticed near photocopiers is of:

Choose an answer

SO2

H2S

O2

O3

In an irreversible reaction dynamic equilibrium:

Choose an answer

Never establishes

Established before the completion of reaction

Establishes after the completion of reaction

Establishes readily

Which vitamin is soluble in water?

Choose an answer

Vitamin A

Vitamin E

Vitamin D

Vitamin C

Which one of the properties of water is responsible for rising of water plants?.

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Specific heat capacity

Surface tension

Excellent solvent action

Capillary action.

The region in which ozone layere depletes is called.

Choose an answer

Ozone hole

Black hole

Both of them

None of them

Which one of the following is Lewis base?

Choose an answer

NH₃

BF₃

H⁺

AlCl₃

Formula of Decane is.

Choose an answer

C₁₀H₂₀

C₁₀H₂₂

C₁₀ H₄

C₁₀H₁₆

Chemical formula of matte will:

Choose an answer

Cu2S.FeS

Cu2S

Cu2O

FeS

Rickets disease is caused by the deficiency of.

Choose an answer

Vitamin D

Vitamin A

Vitamin E

Vitamin C

Vital force theory was rejected by.

Choose an answer

Jabir Bin Hayan

Drawin

Wohler

Berzellius

Carbonization process is the conversion of

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Coal into coal gas

Coal into wood

Wood into coal

Wood into coal tar

Petroleum is refined by:

Choose an answer

destructive distillation

fractional distillation

simple distillation

dry distillation

Photosynthesis process produces.

Choose an answer

Starch

Cellulose

Sucrose

Glucose

Which of the following statement s is not true about fossil fuels?

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they all contain carbon

They are renewable

they produce pollutants when burnt

they cause acid rain

Which of the following is the hardest coal?

Choose an answer

Pear

Lignite

Bituminous

Anthracite

Which is used for cleaning agent for domestic and commercial purpose?

Choose an answer

NaCl

Na₂CO₃

NaHCO₃

Na₂SiO₃

Which one of the following compounds is an aldehyde?

Choose an answer

CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

Which salt cause permanent hardness in water is:

Choose an answer

Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Natural gas is 85% methane, It is used to make the follwing except.

Choose an answer

Carbon black

Ethane

Propane

Both b and c

The bond in the product of lewis acid base reaction.

Choose an answer

Ionic

Covalent

Metallic

Coordinate covalent

Acid occurring in sour milk

Choose an answer

Citric acid

Lactic acid

Bytyric acid

Malic acid

Which one of these protects us against the disease;

Choose an answer

Carbohydrates

Lipids

Proteins

all of these

Which is the essential sugar found in milk?

Choose an answer

Maltose

Lactose

Galactose

Starch

Ozone is beneficial for us as it absorbs.....................

Choose an answer

Infrared Radiations

Ultraviolet radiations

Chlorofluorocarbons

Air pollutants

The order or reactivity of hydrogen halides with alkenes is.

Choose an answer

HI/Br

HBr > HI

HCl > HBr

HBr>HCl

A group of gases that maintains temperature of atmosphere is.

Choose an answer

Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

How many percentage of sunlight is absorbed by atmosphere gases.

Choose an answer

12%

18%

24%

30%

Which one is a pentahydroxy ketone?

Choose an answer

sucrose

glucose

fructose

lactose

Halogenation of alkanes in the presence of diffused sunlight takes place.

Choose an answer

Suddenly, only in one step

Slowly in one step

In a series of step

Fastly in two steps

When the reaction causes to produced it is called.

Choose an answer

Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

Which one of these hydrocarbon molecules would have no effect on an aqueous solution of bromine?

Choose an answer

CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

___________ is not green house effect.

Choose an answer

Increase of food chain

increase atmospheric pressure

Increase of sea level

Increase of flood risks

When a system is at equilibrium states?

Choose an answer

The concentration of reactants and products becomes equal

The opposing reactions

The rate of the reverse reaction becomes very low

The rates of the forward and reverse reactions becomes equal.

Which of the following is reducing sugar?

Choose an answer

Glucose

Maltose

Sucrose

Starch

The % age of carbon is lignite is

Choose an answer

60

70

80

90

Which chemical is called king of chemicals?

Choose an answer

KNO₃

H₂SO₄

HCl

NHO₃

50% dextrose contains approximate amount of energy.

Choose an answer

250 calories

16 Calories

170 calories

120 calories

A salt always

Choose an answer

Contain ions

Contains water of crystallization

Dissolves in water

Forms crystals which conduct electricity

Ethen is prepared by heating a mixture of ethanol and excess of concentrated sulphuric acid at:

Choose an answer

150°C

180°C

250°C - 300°C

400°C - 450°C

The forward reaction takes place:

Choose an answer

Right to left

Left to Right

Only to right

Only to left

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of

Choose an answer

Sodium metal

Zinc metal

Magnesium metal

Potassium metal

|Which one is not an Arrhenius acid?

Choose an answer

HCl

H2SO₄

CO₂

HNO₃

Acid means

Choose an answer

Sour

Bitter

Sweet

Salty

The percentage of protein in dry weight of cell.

Choose an answer

20%

40%

50%

70%

If Qc = Kc the reaction goes in:

Choose an answer

Forward

Reverse

At equilibrium state

None

Dehalogenation of Tetrahalides takes place in the presence of .

Choose an answer

K

Mg

Na

Zn dust

The substance formed during the chemical reaction are called.

Choose an answer

Products

Reactants

Radical

Element

Which gas protects the Earth's surface from ultraviolet radiations?

Choose an answer

CO₂

CO

N₂

O₃

Number of discovered element till today are.

Choose an answer

140

118

90

16

Which of the following gas is used in warfare?

Choose an answer

Methane

Ethane gas

Mustard gas

None of these

Mesophere extend forms 50 km to:

Choose an answer

50 km

12 km

60 km

85 km

The process of removing temporary hardness of water.

Choose an answer

Clark's method

Washing soda method

Sodium zeolite

Filteration method

Main component of natural gas is

Choose an answer

Methane

propane

Butane

Propene

Which acid is used an electrolyte in lead storage battery?

Choose an answer

H₂SO₄

HNO₃

HCl

CH₃COOH

Which acid is present in our stomach.

Choose an answer

Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

Formula of baking soda is.

Choose an answer

Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

Which acid is found in Ant sting?

Choose an answer

Citric Acid

Formic Acid

Uric Acid

Sulphuric acid

Monosaccharides are crystalline solids

Choose an answer

Grey

Crimson

Silver

White

Which hydrocarbon has no effect on an aqueous solution of bromine.

Choose an answer

CH₄

C₁₀H₂₀

C₂H₂

C₂H₄

Which are responsible for transmitting genetic information form generation to generation:

Choose an answer

vitamins

lipids

proteins

Nucleic acids

Water has a maximum density at 4 ^oC

Choose an answer

12 cm^-3

2 g cm^-3

1 g cm^-3

4 gcm^-3

Which one is not a characteristic of an acid:

Choose an answer

it turns red litmus blue

it reacts with base to form salt and water

Its aqueous solution conduct electric current

it has sour taste

The envelope of different gases around the earth is called.

Choose an answer

Atmosphere

Brosphere

Lithosphere

Hydrosphere

In the preparation of insoluble salts, which one of the facts is incorrect?

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Two soluble salts are mixed

Two in soluble salts are mixed .

One of the salt produced is insoluble

Both of the salts produced are insoluble

Which one of the following is crystalline solid.

Choose an answer

Glucose

Starch

Cellulose

Glycogen

Vitamin are accessory Growth factors they play important role in our body like.

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Provide energy to the body.

Insulate our body from electric shock

Build brain cells

Regulate metabolism

The green house effect is proportional to the amount of which gas in air.

Choose an answer

CO₂

O₂

N₂

All of them

If a liquid has a pH of 7 then it must.

Choose an answer

Be a colourless and odourless liquid

Freeze at 0 ^oC and boil at 100 ^oC

Be natural

Be a solution containing water

Coal having 90% carbon contents is called.

Choose an answer

Peat

Lignite

anthracite

bituminous

In solvay's process slaked lime is used to:

Choose an answer

Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

The general formula of alkane is

Choose an answer

C_nH_2n+2

C_nH_2n-2

C_nH_2n

C_nH_2n+1

Alkanes do not react in

Choose an answer

Diffused sunlight

Dark

Bright sunlight

None of these

When HCl and KOH is reacted the salt formed is.

Choose an answer

Acidic

Basic

Normal

Complex

Grease stains from clothes are removed by sing.

Choose an answer

Ammonium nitrate

Aluminium hydroxide

Ammonium hydroxide

Aluminum chloride

Chemical formula of amino group is

Choose an answer

NH₃

NH₂

NH₄

COOH

Glucose and fructose are;

Choose an answer

trioses

tetroses

pentoses

hexoses

Ozone is formed in:

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

A neutral salt is not composed of.

Choose an answer

Metallic ion

Non metallic anion

Anion of base

Anion of acid

_______ is the king of chemicals.

Choose an answer

Hydrochloric acid

Nitric Acid

Sulphuric acid

Phosphoric acid

The Earth's atmosphere is getting hotter because of.

Choose an answer

Increasing concentration of CO

Increasing concentration of CO₂

Increasing concentration of O₃

Increasing concentration of SO₂

Urea is nitrogenous fertilizer. It consist of nitrogen.

Choose an answer

26.6 %

36.6%

46.6%

56.6%

Uric Acid is present in

Choose an answer

Apple

Fats

Urine

Grapes

Lipids are macromolecules. They have characteristics except one of the following.

Choose an answer

They are high energy foods.

They are soluble in water.

They are poor conductor of heat.

They are esters of fatty acids.

Hook warm larvae enter the body through.

Choose an answer

Food

Water

Skin

All of them

The earth atmosphere is getting hotter because of :

Choose an answer

SO₂

O₃

CO₂

CO

In dry cleaning, which chemical is used.

Choose an answer

Chloroform

Carbon tetachloride

Ecetaldehyde

Ethanol

When acids react with metals which gas is evolved?

Choose an answer

H₂

O₂

Cl₂

N₂

Alkanes are also called:

Choose an answer

olefins

Paraffins

aliphatic compound

cyclic compounds

Bronsted and Lowry presented their theories of acids and bases in

Choose an answer

1785

1787

1923

1925

Enzymes are chemically;

Choose an answer

lipids

carbohydrates

proteins

vitamins

Hard water can cause.

Choose an answer

Stomach disorder

Boiler blasts

Inefficiency of engine

All of them

The rate of reverse reaction in the beginning.

Choose an answer

Slow

moderate

Very fast

Low

Oxidation of alkenes forms:

Choose an answer

Glycol

Glyoxal

Formic acid

Oxalic acid

Formic acid is present in

Choose an answer

String of bees

Sour milk

Apple

Fats

Major portion of ozone layer is foun in.

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

Methyl orange produces which colour in basic solution

Choose an answer

Red

Yellow

Pink

White

Which of the following thing is a lewis base?

Choose an answer

NH₃

BF₃

H⁺

AlCl₃

We exhale gas in the atmosphere during respiration.

Choose an answer

Carbon dioxide

Oxygen

Nitrogen

Water

The water of crystallization is responsible for the.

Choose an answer

Melting points of crystals

Boiling points of crystals

Shapes of crystals

Transition point of crystals

High concentration of which metal clogs the fish gills.

Choose an answer

Zinc

Aluminium

Sodium

Copper

Which one of the following does ot contain protein

Choose an answer

Pulses

Potatoes

Beans

eggs

In smelting process a small amount of coke is required because:

Choose an answer

it is highly endothermic process

it is highly exothermic process

it is very fast process

it is very slow process

The % age of carbon in peat is :

Choose an answer

60%

70%

80%

90%

Permanent hardness can be removed by using .

Choose an answer

Soda lime

Sodium Zeolite

Quick lime

Lime water

ozone depletion (i.e O3--------------> O2 + O) occurs in:

Choose an answer

lower stratosphere

middle stratosphere

upper stratosphere

troposphere

How trace amount of acetylene present in the coat gas.

Choose an answer

0.06%

0.07%

0.08%

0.09%

Fertilizers are used to make up the deficiency of;

Choose an answer

oxygen and carbon

iron and magnesium

nitrogen and phosphorus

hydrogen and calcium

Which process is responsible for ascending of water in roots:

Choose an answer

evaporation

transpiration

condensation

capillary action

The region of ozone decomposition in stratosphere is.

Choose an answer

20 km

30 km

40 km

50 km

pH value normally varies from.

Choose an answer

0-14

1-14

7-14

10-14

The raw materials for the manufacturing of urea are.

Choose an answer

Ammonia

Carbondioxide

Limestone

a & b

General formula of alcohols is:

Choose an answer

RCHO

ROH

O= R - C -OH

O = R - C- R

Hypoglycemia result due to:

Choose an answer

high cholesterol level

low cholesterol level

low sugar level in body

high sugar level in body

Which compound do not produce in the halogenation of methane.

Choose an answer

Chloroform

Carbon tetrachloride

Carbon black

Chloromethane

The reduction of alkyl halides takes place in the presence of

Choose an answer

Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

When acid reacts with sulphites and Bi sulphates which gas is evolved?

Choose an answer

H2

CO₂

SO₂

NH₃

Chemical formula of chloroform.

Choose an answer

CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Some organic compound are soluble in water due to the presence of .

Choose an answer

-OH

H⁺

Botha a and b

Covalent bond

Dilute acids react with carbonates to produce the given products except.

Choose an answer

Salt

Water

Hydrogen

Carbon dioxide

Runcid butter has

Choose an answer

Foul smell

Rotten egg smell

Pungent smell

No smell

Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:

Choose an answer

Ni-metal

Zn-metal

Na - Metal

Fe2O3

Alkanes are produced in large amounts by cracking of

Choose an answer

Natural gas

Petroleum

Benzene

Xylol

The number of carbon atoms present in petroleum gas.

Choose an answer

1-2

1-3

1-4

1-5

Which one of the following is not a fossil fuel?

Choose an answer

Coal

Natural gas

Bio gas

Petroleum

Normally rain water is weakly acidic because of.

Choose an answer

SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

Which one of the following is not a greenhouse Effect?

Choose an answer

Increasing atmosphere temperature.

Increasing food chains

increasing flood risks

Increasing sea-level

Which disease cause when humans use water of industrial effuents.

Choose an answer

Cancer

Asthma

Jaundica

Cholera

Carbon monoxide is harmful to us because.

Choose an answer

It paralyses the lungs.

It damages lungs tissues.

It reduces oxygen carrying ability of haemoglobin

It makes the blood coagulate.

How many percentage to water contains oceans?

Choose an answer

67%

77%

87%

97%

PAN stands for

Choose an answer

Poly aniline nitrate

Proxy acetyl nitrate

Poly acetyl nitrite

Proxy acetyl nitrite

The black residue of the coal tar is called:

Choose an answer

peat

lignite

pitch

matte

Which gas is responsible in warming the atmosphere?

Choose an answer

Nitrogen

Hydrogen

Helium

Fluorine

When the numbers of moles of both sides are equal in a reaction, then the unit of K_c will be:

Choose an answer

No unit

mol^-2 dm⁶

mol dm³

mol^-2dm

The product of Lewis acid-base reaction is called adduct. The bond between the adduct species is.

Choose an answer

Ionic

Covalent

Metallic

Co-ordinate covalent

The major components of Atmosphere are:

Choose an answer

Carbon and Nitrogen

Nitrogen and Oxygen

Oxygen and Chlorine

None of these

75% atmosphere mass lies in how many kilometers.

Choose an answer

11 km

30 km

50 km

85 km

Dehydration means removal of.

Choose an answer

Water

Halogen

Hydrogen

All above.

Ozone has a smell

Choose an answer

Bitter

Rotten egg

Sweat

None of them

Which one gas is liberated when alkalies react with ammonium salts?

Choose an answer

O₂

CO₂

H₂

NH3

At which region all weather occurs?

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

Incomplete combustion of alkanes produce.

Choose an answer

Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

Depending upon temperature variation, atmosphere ins divided into how many regions?

Choose an answer

1

2

3

4

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

Choose an answer

C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

Red hair contains compound of.

Choose an answer

Iron

copper

titanium

Molybdenum

When CaCO_3,.is heated in an open flask, it decomposes to form calcium oxides and .

Choose an answer

O₂

CO

CO₂

CO₃

The gas use by plants to perform photosynthesis.

Choose an answer

O₂

CO₂

N₂

CO

The order of reactivity of hydrogen halides with alkenes is.

Choose an answer

HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

Which gas is emitted due to volcanic eruption?

Choose an answer

CO₂

SO₃

NO₂

H₂

Concentration is a .

Choose an answer

Mixing technique

Separating technique

Boiling technique

cooling technique

Freezing point of water is:

Choose an answer

-4°C

0°C

-36°C

-58°C

Manufacturing of urea involves:

Choose an answer

2 steps

3 steps

4 steps

5 steps

What is the pOH of Ca(OH)2, 0.02 M Solution.

Choose an answer

1.698

1.397

12.31

12.61

By which process alkenes are prepared from alcohols:

Choose an answer

Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

Photosynthesis process produce.

Choose an answer

Carbondioxide

Glucose and oxygen

Carbon di oxide

glucose and carbondoxide

The end product of oxidation of acetylene is.

Choose an answer

Propen glycol

Ethan glycol

Glyoxal

Oxalic acid

The number of carbon atoms present in petroleum ether.

Choose an answer

1-5

2-5

3-7

5-7

Which one is the formula of chloromethane.

Choose an answer

CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

Which one of these is used as anaesthesia?

Choose an answer

carbon black

Mehtane

Ethane

Chloroform

Pitch is black residue of

Choose an answer

Coke

Coal-tar

Coal

Coal gas

Plants produces by the photosynthesis process.

Choose an answer

Glucose

Fructose

Sucrose

Maltose

According to the Lewis concept acid is a substance which can.

Choose an answer

Donate a proton

Donate a pair of electron

Accept a proton

Accept a pair of electron.

Which one of the following is gas at room temperature:

Choose an answer

C2H6

C6H14

C6H6

C8H18

The strong heating of coal in the absence of air called.

Choose an answer

Fractional Distilation

Destructive Distiation

Carbonization

Catenation

The bond angle between H-O-H in water is:

Choose an answer

104.5^o

104.6^o

104.7^o

104.8^o

Acidic solutions have pH value.

Choose an answer

Less than 7

Greater than 7

equal to 7

None of these

Which one of the not metal.

Choose an answer

Copper

Carbon

chromium

Iron

The major constituents of troposphere are:

Choose an answer

carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

The two major components of atmosphere are:

Choose an answer

Hydrogen and oxygen

Nitrogen and Hydrogen

Nitrogen and oxygen

Oxygen and water.

Ultraviolet radiations can causes.

Choose an answer

Hepatitis

Asthma

Skin cancer

Night blindness

A salt is not composed of

Choose an answer

A metallic cation

Non -metallic anion

an anion of a base

An anion of an acid

Which compound protect teeth from diseases?

Choose an answer

Fluorine compound

Chlorine compound

Iodine compound

Bromine compound

Acid used for cleaning metals , tanning and in printing industries, is:

Choose an answer

H2SO4

HNO3

CH3COOH

HCI

Normal temperature and pressure (S.T.P) of gas rafers to

Choose an answer

273 K and 76 mm Hg

273° C and 760 mm Hg

273 K and 760 mm Hg

273° C and 76 mm Hg

Solvent extraction is an equilibrium process and it is controlled by

Choose an answer

Law of mass action

The amount of solvent used

Distribution law

The amount of solute

Choose an answer

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will

Choose an answer

Remain unchanged

Increase four times

Reduce to 1/4

Be doubled

At equilibrium stage of chemical reaction

Choose an answer

The concentration of reaction is equal to concentration of products

The rate constant of forward reaction is equal to rate constant of backward reaction

The rate of forward reaction is equal rate of backward reaction

The energy of activation of forward step is equal to energy of activation of backward step

K_aand K_bof a conjugate acid and are related with k_was

Choose an answer

K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

Choose an answer

1

2

3

None of these

The liquid pair which is not completely miscible is

Choose an answer

CH₃OH and water

Alcohol and water

Phenol and water

Benzene and toluene

Noon has low critical temperature and pressure as compared to other gases. the most probable reason is that

Choose an answer

Its octet is complete

It is a monoatomic gas

It has very low polarizability

It has least forces of attraction

The number of Na, ions which surround each CI^1-ion the NaCI crystal lattice is

Choose an answer

8

12

6

4

One mole of CH₃OH and one mole of C₂H₅OH have

Choose an answer

Equal number of atoms

Equal number of molecules

Equal number of electrons

Equal number of protons

When a reaction proceeds in a sequence of steps, the overall rate is determined by

Choose an answer

Fastest step

Slowest step

Order of different steps

Molecularity of all steps

In paper chromatograghy the point at which the solvent rises to maximum extent is called

Choose an answer

Event

Chromatogram

Solvent front

Base line

An ionic compound A⁺B^-is most likely to be formed when

Choose an answer

The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron affinity of B are high

Both the ionization energy of A and electron affinity of B are low

A material or a collection of materials which is under study is called

Choose an answer

State function

Degree and joule

Degree and ergs

Calorie and joule

Which of the following will have the same number of molecules at STP

Choose an answer

280 cm³of CO₂and 280 cm³of N₂O

11.2 dm³of O₂and 32 g of O₂

44 g of CO₂and 11.2 dm³of CO

28 g of N₂and 5.6 dm³of oxygen

One of the following statements about Born-Haber cycle is correct. Which is that statement

Choose an answer

Born-Haber cycle is different from Hess's law

The energy change in a cyclic process is not zero

The lattice energy of the crystalline substances can be calculated easily

Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously

Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when

Choose an answer

It is saturated

Is shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

Is is metastable

In endothermic reactions, the heat content of the

Choose an answer

Products is more then that of reactants

Reactants is more than that of products

Both a and b

Reactant and products is equal

Which of the hydrogen halides has the highest percentage of ionic character

Choose an answer

HF

HBr

HCI

HI

The cathodic reaction in the electrolysis of dill. H₂SO₄with Pt electrodes is

Choose an answer

Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

Isotopes are the atoms of same element with similar chemical properties but different

Choose an answer

Atomic number

Atomic volume

Atomic weight

Atomic structure

During the process of crystallization, the hot saturated solution;

Choose an answer

Is cooled very slowly to get large-sized crystals

Is cooled at a moderated rate to get medium-sized crystals

Is evaporated to get the crystals of the product

Is mixed with an immiscible liquid to get the pure crystals of the produce

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

Choose an answer

the order of the rate of diffusion of gases NH₃, SO₂, CI₂and CO₂is

Choose an answer

NH₃> SO₂>CI₂CO₂

NH₃> CO₂> SO₂> CI₂

CI₂> SO₂> CO₂> NH₃

NH₃> CO₂> CI₂> SO₂

The effect of temperature on equilibrium was studied by

Choose an answer

Lewis

Van der wall

Arrhenius

Vant hoff

When hot saturated solution is cooled very rapidly, we get

Choose an answer

Medium sized crystals

large sized crystals

Premature crystallization of the substance

Old crops of crystals

The net change in a chemical reaction is same whether it takes place directly or indirectly is

Choose an answer

Henry's law

Charles's

Hess's lass

Graham's law

The highest temperature above which a gas cannot be liquified, no matter how much the pressure is applied is known as

Choose an answer

Boiling temperature

Consulate temperature

Absolute zero

Critical temperature

The azimuthal quantum number / = 2, then M(Magnetic quantum number) can have values as

Choose an answer

+1, -1

+1, 0, -1

+2, +1, 0,1, -1, 2

+3, +2, +1, 0, 1, -2, -3

Quantum number value for 2p sub shell are

Choose an answer

n = 2, I = 1

n = 1, l =1

n = 1, l = 0

n = 2, l = 0

The molal boiling point constant is the ration of the elevation in boiling point to

Choose an answer

Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

Depression in the F.P is directly proportional to

Choose an answer

Molarity of solution

Molarity of solvent

Molality of solvent

Molality of solution

That cell in which electrical energy is converted into chemical energy is called

Choose an answer

Galvanic cell

Electrolytic cell

Fuel cell

Daniel cell

A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed

Choose an answer

If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

Which one of the following substances is used as decolouring agent

Choose an answer

Animal charcol

Concentrated H₂SO₄

CaCI₂

Silica gel

The shape of H₃O is

Choose an answer

Tetrahedral

Angular

Trigonal planer

Pyramidaj

In the ground state of an atom, the electron is present

Choose an answer

In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

Rutherford's model of atom failed because

Choose an answer

The atom did not have a nucleus and electrons

It did not account for the attraction between protons and neutrons

It did not account for the stability of the atom

There is actually no space between the nucleus and the electrons

The pK_avalue of CH₃COOH is 4.74 when we mix CH₃COOH and CH₃COONa in the ratio of 10:1, tehn the pH of the buffer is

Choose an answer

4.74

5.74

3.74

7.00

Choose an answer

Fe is reduced

Fe is oxidized

CI₂is oxidized

None of these

According to classical concept, oxidation involves

Choose an answer

Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

If we want to change O₂to O₂^-1The electron is to be placed in

Choose an answer

In order to mention the B.P. of water at 110°C, the external pressure should be

Choose an answer

Between 760 torr and 1200 torr

Between 200 torr and 760 torr

760 torr

Any value of pressure

Electromotive force of the cell is the

Choose an answer

Difference of two electrode potentials

May be sum or the difference of two electrode potentials

Sum of two electrode potential

Depends upon the nature of the cell

How should the condition be changed to prevent the volume of a given gas from expanding when its mass is increased

Choose an answer

Temperature is lowered and pressure is increased

Temperature is increase and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

The influence of temperature on reaction rate is predicated by

Choose an answer

Free energy change of reaction

Arrhenius equation

Van der weal's equation

Kinetic equation

The charge on electron was determined by millikan in his oil drop experiment and its value is

Choose an answer

6.023 x 10^-23C

1.602 x 10^-23C

1.602 x 10^-19C

6.625 x 10^-34C

The volume occupied by 1.4 g on N₂at S.T.P is

Choose an answer

2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

The nature of positive rays depends on

Choose an answer

The nature of electrode

The nature of discharge tube

The nature of residual gas

All of the above

The true representation for the units of rate constant K for the first order reaction

Choose an answer

sec^-1

mole dm^-3s

mole dm^-3s^-1

mole^-1dm⁺³s^-1

A limiting reactant is that one which

Choose an answer

Gives greatest number of moles of products

Gives least number of moles of products

Is left behind after the completion of reaction

Is mostly a cheaper substance as compared to other reactants

NaCI and sand can be separated by one of the following without filtration

Choose an answer

Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

The iodine present in water can be separated by which one of the following techniques

Choose an answer

Sublimation

Chromatography

Filtration

Solvent extraction

The number of moles of CO₂which contain 8.0 g of oxygen

Choose an answer

0.25

0.50

1.0

1.50

The shielding effect of the inner electrons is responsible for

Choose an answer

Increasing ionization energy values

Decreasing ionization energy values

Increasing electron affinity

Increasing electonegativity

The change in heat energy of a chemical reaction at constant temperature and pressure is called

Choose an answer

Enthalpy change

Bond energy

Heat of sublimation

Internal energy change

Gas equation is derived by combining

Choose an answer

Avogadro's and Charles's Law

Boyle's and Charles's Law

Avogadro's and Boyle's Law

Avogadro's, Boyle's and Charles's Law

In gas occupies a volume of 2 dm³at 27°C and I atm pressure. The expression for its volume at S.T.P. is

Choose an answer

Bohr's model of atom is contradicted by

Choose an answer

Planck quantum theory

Quartization of energy of electrons

Heisenberg's uncertainty principle

Quartization of angular members

In azeotropic mixture showing positive deviation from Raoult's law the volume of the mixture is

Choose an answer

Slightly more than the total volume of the components

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

Which of the following molecules has a co-ordinate covalent bond

Choose an answer

NH₄CI

NaCI

HCI

AICI₃

The polarizabilities of elements mostly increase down the group due to the reason that

Choose an answer

The atomic numbers increase

Number of protons increase

Number of shells increase along, with increase of shielding effect

The behavior of the elements remain the same

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

Choose an answer

3.0

2.7

2.0

1.5

NH₃shows a maximum boiling point among the hydrides of V-A group elements due to

Choose an answer

Very small size of nitrogen

Lone pair electrons present on Nitrogen

Enhanced electronegative character of Nitrogen

Pyramidla structure of NH₃

Those elements whose electronegativities are 1.2 and 3.2, react to form

Choose an answer

Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

Calcium has isotopes

Choose an answer

7

9

1

6

Velocity constant is the rate of reaction when the concentrations of reactants are

Choose an answer

Zero

Unity

Two

Three

When water freezes at 0°C, its density decreases due to

Choose an answer

Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

The number of moles of acid or base required by one dm³of buffer to alter its pH by one unit is called

Choose an answer

Buffer efficiency

Buffer capacity

Buffer action

None

Which of the following molecules has zero dipole moment

Choose an answer

NH₃

CHCI₃

H₂O

BF₃

One of the following substances is not used as a drying reagent in a desiccator

Choose an answer

Cons. H₂SO₄

P₂O₅

Silica gel

50% KOH

Whenever a reaction is endothermic, then it means that

Choose an answer

Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

Which of the following particles would on losing an electron has its outermost p-orbital as half filled

Choose an answer

Nitrogen atom

O⁺ion

P^-1ion

S⁺¹ion

18 g of glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to

Choose an answer

1/5

5.1

1/51

6

The free expansion of the gas from high pressure towards the low pressure causes

Choose an answer

Increase of temperature

Decrease of temperature

Grater number of collisions among the molecules

Decrease of velocity of gas molecules

Anode rays were discovered by

Choose an answer

J. Stoney

Rutherford

J.J. Thomson

Goldstein

Isotopes differ in

Choose an answer

Properties which depend upon mass

Arrangement of electrons in orbital

Chemical properties which depend upon weight

Atomic number

The power of which the concentration of a substance appears in the rate expression is known as

Choose an answer

order of reaction with respect to that substance

Rate of reaction

Order of reaction

Molecularity of reaction

At constant volume of a system remains constant and the heat is absorbed by the system, them amount of heat absorbed is called

Choose an answer

Enthaply change of the system

Internal energy change of the system

Total enthalphy of the system

Total internal energy of the system

The unit of rate constant is same as that of rate of reaction in

Choose an answer

first order reaction

Second order reaction

Third order reaction

Zero order reaction

After 3 half lives of a chemical reaction, the % fraction of the amount left is

Choose an answer

6.25

75

12.5

50

NaCI is face centered cubic structure. The Na ion at the face of the unit cell is shared by

Choose an answer

2-unit cells

4-unit cells

Only one unit cell

8-unit cells

Which of the following represents electronic configuration of the most electropositive elements

Choose an answer

He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

Which of the following precautions in necessary for smooth filtration

Choose an answer

The filter paper should be of big size

The tip of funnel should not touch the side of the beaker

The stem of the funnel should be very small

The stem of he funnel should remain continuously full of liquid

Which of the following statement is contrary to the first law of thermodynamics

Choose an answer

An equivalent amount of heart energy can neither be created nor destroyed

One form of energy can be transferred into an equivalent amount of other kinds of energy

In an adiabatic process, the work done is independent of its path

Continuous production of mechanical work without supplying an equivalent is amount of heat possible

In zero order reaction, the rate is independent of

Choose an answer

Temperature of reaction

Concentration of reactants

Concentration of products

None of these

If a strip of Cu metal is placed in a solution of FeSO₄

Choose an answer

Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes place

A buffer solution can be prepared by mixing

Choose an answer

Weak acid and its salt with weak base

Weak base and its salt with strong acid

Strong acid and its salts with weak base

Strong base and its salt with weak acid

The number of bonds in nitrogen molecule is

Choose an answer

One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

Which of the following is true for ionic compounds

Choose an answer

They are non-electrolytes in the molten state

They have bonds which are directional

They conduct electricity in solid state

They are generally more soluble in polar solvents than in non-polar solvents

How many allotropic forms are present in carbon

Choose an answer

Two

Three

Four

Five

For which system does the equilibrium constant K_chas units of (concentration)^-1

Choose an answer

Actual yield is mostly less than the theoretical yield due to the reason that

Choose an answer

Rates of reactions are slow

Loss of the product during handling

Reactions are never completed 100%

Law of conservation of mass is not true

Which of the following statements is correct about galvanic cell

Choose an answer

Anode is negative charged

Reduction occurs at anode

Cathode is positively charged

Reduction occurs at cathode

In order to have good crystals of a substance the temperature of the system at the time of preparation of solution should be

Choose an answer

Around 0°C

Around room temperature

Sufficiently more than room temperature

Just above the room temperature

London dispersion forces are the only forces present among the

Choose an answer

Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecules of solid iodine

Molecules of hydrogen chloride gas

Fuel cells are the means by which chemical energy may be converted into

Choose an answer

Heat energy

Magnetic energy

Sound energy

Electric energy

The line of the balmer series in the visible region of the spectrum, but the limiting line, in the series lies in

Choose an answer

Visible region

X-Ray region

I.R region

U.V. region

Many elements have fractional atomic masses. This is because

Choose an answer

The mass of the atom is itself fractional

Atomic masses are average masses of isobars

Atomic masses are average masses of isotopes

Atomic masses are average masses of isotopes proportional to their relative abundance

Acetone and chloroform are soluble in each other due to

Choose an answer

Intermolecualr hydrogen bonding

Dipole-dipole interaction

Instantaneous dipoles

All of the above

The reaction that involves gases, its rate does not depend upon

Choose an answer

Catalyst

Temperature

Moles dm^-3

Partial pressure

The long chains of amino acids are coiled about one another onto a spiral by

Choose an answer

Ionic bond

Van der walls forces

Hydrogen bonding

Overlapping of orbitals

Chromatography is the process which involve the distribution of a solute between

Choose an answer

Two mobile phases

A stationary phase and mobile phase

Two stationary and two mobile phases

Two stationary phases

Orbitals having same energy are called

Choose an answer

Hybird orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Oxidation number of carbon in NaHCO₃

Choose an answer

+4

-6

+6

+2

The octet rule in not followed in the formation of

Choose an answer

NF₃

CF₄

CCI₄

PCI₅

Fluorine molecule (F₂) is formed by the overlap of

Choose an answer

s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

Splitting of spectral lines when atoms are subjected to strong electric field is called

Choose an answer

Zeeman effect

Stark effect

Photoelectric effect

Compton effect

The solubility product of AgCI is 2.0 x 10^-10mol²dm^-6The maximum concentration of Ag⁺ions in the solution is

Choose an answer

2.0 x 10^-10mol dm^-3

1.41 x 10^-5mol dm^-3

1.0 x 10^-10mol dm^-3

4.0 x 10^-20mol dm^-3

One of the following substances does not undergo sublimation

Choose an answer

KMnO₄

Naphthalene

NH₄CI

Iodine

Depression of freezing point method is used for determination of molar masses of

Choose an answer

Electrolytes

Non-volatile solids

Volatile solids

Volatile liquids

Calorie is equivalent to

Choose an answer

0.4184 J

41.84 J

4.184 J

418.4 J

Most of the reaction which give stable products are

Choose an answer

Exothermic

Endothermic

Isothermal

None of these

Rate of diffusion of CO and N₂are same at room temperature due to the reason, that

Choose an answer

Both are diatomic molecules

Both have same multiple bond in them

Both have lone pairs in them

Both have same molar masses

VSEPR theory was proposed by

Choose an answer

Nyholn and Gillespie

Kossel

Lewis

Sidwick

The volume occupied by 1.6 g of O₂at STP is

Choose an answer

22.4 dm³

2.24 dm³

1.12 dm³

112 dm³

One of the following liquids has lowest vapour pressure at 32°C. Indicate that liquid

Choose an answer

Ether

Chloroform

Ethanol

Water

The comparative rates at which the solutes move in paper chromatography, depends on

Choose an answer

The size of paper used

Their R_fvalues

Their partition coefficients

The polarity of solvent used

Stronger the oxidizing agent, greater is the

Choose an answer

oxidation potential

Reduction potential

Redox potential

E.M.F of cell

Which of the following solutions will have the highest boiling point

Choose an answer

0.1 M NaCI

0.1 M CaCI₂

0.1 M FeCI₃

0.1 M glucose

The repulsion of electronic clouds of the molecules are responsible for the attractive forces among the molecules. These forces are

Choose an answer

Dipole-induced dipole forces

Ion-dipole forces

Instantaneous dipole-induced dipole forces

Dipole-dipole forces

A solution of glucose is 10% to volume in which 1 g mole of it is dissolved will be

Choose an answer

1 dm³

1.8 dm³

200 cm³

900 cm³

The unit of the rate constant is same as that of the rate of reaction in

Choose an answer

First order reaction

Second order reaction

Zero order reaction

Third order reaction

Choose an answer

Heat of reaction

Heat of sublimation

Heat of neutralization

Heat of combustion

Choose an answer

dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

The crystallization of a solid substance is done from a hot saturated solution. The solution is

Choose an answer

Evaporated rapidly

Cooled very slowly to get good crystals

Cooled rapidly to get excellent crystals

Mixed with another miscible solvent

The rate of reaction

Choose an answer

Increases as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reaction proceeds

May decrease or increase as the reaction proceeds

Which one of the following substances is not amorphous

Choose an answer

Polymer

Rubber

Glass

AgNO₃

Pressure remaining constant at which temperature the volume of a gas will become twice of what it is at 0° C

Choose an answer

546°C

200°C

546 K

273 K

Azeotropic mixture can be separated into pure components by

Choose an answer

Distillation

Fractional distillation

Vacuum distillation

None

Gases deviate from ideal behaviour at high pressure. Which of the following is correct for non-ideal behaviour of gases

Choose an answer

At high pressure, the gas molecules move in one direction only

At high pressure, the collisions between the gas molecules are increased

At high pressure, the volume of the gas becomes insignificant

At high pressure, the intermolecular attraction becomes significant

The relationship between K_pand K_cis given by

Choose an answer

If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air

Choose an answer

Remains constant

Increase

Decrease

Increase a bit

Colligative properites are the properties of

Choose an answer

Dilute solutions which behave as nearly ideal solution

Concentrated solution which behave as nearly non-ideal solution

Both a and b

Neither a nor b

What happens to the enthalpy change when the coeffficients of a chemical equation are douubled

Choose an answer

It doubles

It becomes half

It does not change

It cannot be predicted

When a non-spontaneous redox reaction is carried out by using the electrical current, then the process is called

Choose an answer

Decomposition of the substances

Cracking

Hydrolysis

Electroiysis

For a given process, the heat change at constant pressure (q_p) and at constant volume (q_v) are related to each other as

Choose an answer

q_p= q_v

q_p< q_v

q_p> q_v

q_p= q_v/2

Le-Chatelier Braun principle is sometimes known as

Choose an answer

Law of mass action

Law of mobile equilibrium

Law of active mass

All of these above

Tin has Isotopes

Choose an answer

7

9

11

5

An aqueous solution of ethanol in water has vapour pressure

Choose an answer

Equal to that water

Equal to that of ethanol

More than that of H₂O

less than that of water

The value of pH and P^oHof pure water at 25° C is

Choose an answer

14

7

1 x 10^-14

1 x 10¹⁴

Which of the following compound has the highest % o f oxygen by weight

Choose an answer

CH₃- OH

C₂H₅OH

HCOOH

H₂O

The relative lowering of vapour pressure is equal to the mole fraction of the solute. This law is known as

Choose an answer

Ostwald dilution law

Raoult's law

Vant hoff's law

Henry's law

The nature of bond in diamond is

Choose an answer

Electrovalent

Metallic

Coordinate covalent

Covalent

The molecules of a gas show more deviation from ideal behaviour at low temperature, because

Choose an answer

Attractive force dominate at low temperature

Kinetic energies are increased

Collisions become less frequent

Densities of the gases increase

In stoichiometric calculations

Choose an answer

The reaction can be reversile

Side products can be formed

Law of conservation of mass may not be obeyed

Law of definite proportions is definitely obeyed

The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is knnown as

Choose an answer

Henry's law

Hess's law

Joule's principle

Law of combustion

The molar volume of CO₂is maximum at

Choose an answer

STP (0°C and 1 atm)

127° C and 1 atm

0°C and 2 atm

273°C and 2 atm

I molar volume of a gas at S.T.P is occupied by

Choose an answer

1 g of gas

6 x 10²³g of gas

22.4 m³of gas

1 gram molecular mass of gas

Which of the following solutions has the highest boiling point

Choose an answer

5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling points

The electrode reaction of a voltaic cell can be reversed when

Choose an answer

Concentrations of solutions are changed

Temperature is increased

Electrodes are interchanged

Electric circuit is employed to supply the source of electricity

The wave number of the light emitted by a certain source is 2 x 10⁶m. the wavelength of this light is

Choose an answer

500 nm

500 m

200 nm

5 x 10⁷m

SP^3-hybridization in important in describing the bonding in

Choose an answer

Two solution of NaCI and KCI are prepared separately by dissolving same moles of them in the fixed amount of solvent. Which of the following statements is true for these solution

Choose an answer

KCI solution will have higher boiling point than NaCI solution

Both the solutions have different boiling point

KCI and NaCI solution possess same vapour pressure

KCI solution possesses lower freezing point than NaCI solution

With increase in 10°C temperature, the rate of reaction double. This increase in rate of reaction is due to

Choose an answer

Decrease in activation energy of reaction

Decrease in the number of collisions between reactant molecules

Increases in activation energy of reactants

Increase in number of effect collisions

Solvent extraction method is particularly useful technique for separation when the product to be separated is

Choose an answer

Non-volatile or thermally unstable

Volatile or thermally unstable

Non-volatile or thermally stable

Volatile or unstable

If the energy of the activated complex lies close to energy of reactants, it means that reaction is

Choose an answer

Slow

Fast

Exothermic

Endothermic

The distillation of a solution under reduced pressure is called

Choose an answer

Fractional distillation

Destructive distillation

Distillation

Vacuum distillation

The atomis radius is of the order of

Choose an answer

10^-8cm

10⁸cm

10^-12cm

10^-10cm

If the salt bridge is not used between two half cells, then the voltage

Choose an answer

Decreases rapidly

Decreases slowly

Does not change

Drops to zero

The best reducing agent is

Choose an answer

F^-1

CI^-1

Br^-1

I^-1

The S.I. units for the molar heat capacity are

Choose an answer

Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

Which of the following statements is not correct regarding bonding molecular orbitals

Choose an answer

Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed

Bonding molecular orbitals have low electron density between the two nuclei

Every electron in the bonding molecular orbitals contributes to the attraction between atoms

Bonding molecular orbitals are formed when the electron waves undergo constructive interference

Equal masses of methane and oxygen are mixed in an empty container at 25°C, the fraction of total pressure exerted by oxygen is

Choose an answer

1/3

8/9

1/9

16/17

The number of molecules in one dm³of water is close to

Choose an answer

The mass of one mole of electrons is

Choose an answer

1.008 mg

0.55 mg

0.184 mg

1.673 mg

During the electrolysis of molten NaCI, the ion which is reduce is

Choose an answer

How many moles of AgCI are produced by combination of 1.0 mole of AgNO₃and 2.0 mole of NaCI

Choose an answer

1.0

2.0

3.0

4.0

Diamond is a bad conductor of electricity because

Choose an answer

It has a tight structure

It has a high density

There are no free electrons present in the crystal of diamond to conduct electronics

None of these

Electrochemical series is the arrangement of the electrodes in

Choose an answer

Increasing order of reduction potentials

Decreasing order of reduction potentials

Increasing order of oxidation reduction potential

There is no fixed arrangement

The pH of human blood is

Choose an answer

7.0

7.4

4.0

6.5

The velocity of photon is

Choose an answer

Independent of its wavelength

Depends on its wavelength

Equal to square of its amplitude

Depends on its source

The unit of mole fraction is

Choose an answer

Moles dm^-3

Moles kg^-1

Gram dm^-3

None

Which of the following can form H-bonds

Choose an answer

NH₃

C₂H₆

NaCI

CHCI₃

When i₂present in the aquous layer in the form of I^-1₃foes to CCI₄layer, then the change in colour is from

Choose an answer

Purple to brown

Purple to green

Green to brown

Brown to purple

Molarity of pure water is

Choose an answer

1

18

55.5

6

A substance which rerareds the rate of a reaction is called

Choose an answer

Inhibitor

Activator

Auto-catalyst

None of these

If uncertainty position of an electron is zero, the uncertainty in its momentum would be

Choose an answer

Zero

Infinite

Both a and b

None of these

The molecules of CO₂in dry ice form the

Choose an answer

Ionic crystal

Covalent crystals

Molecular crystals

Any type of crystals

Which of the following species has unpaired electrons in anti-bonding molecular orbitals

Choose an answer

O₂⁺²

N₂^-2

B₂

F₂

The unit of rate constant depends upon

Choose an answer

Number of reactants

Concentration terms

Order of reaction

Molecularity of reaction

Choose an answer

The value of K_pfalls with a rise in temperature

The value of K_pfalls with increasing pressure

Adding V₂O₅catalyst increase the equilibrium yield of sulphur trioxide

The value of K_pis equal to K_c

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

Choose an answer

Change of temperature

Change of pressure

Change of concentration

Catalyst

The separation of the different isotopes in the mass spectrometer is done on the basis of

Choose an answer

Different amounts of positive changes

Charge e/m value different amounts of negative changes

Different m/e value

Velocities of the ions

Electrolysis is a process in which a chemical reaction takes place at the expense of

Choose an answer

Chemical energy

Electrical energy

Heat energy

None of these

The mathematical relation between the rate of reaction and the concentrations of the reactants is known as the

Choose an answer

Rate equation

Rate law

Arrhenius equation

Both a and b

The reaction between fat and NaOH is

Choose an answer

Estrification

Hydrogenolysis

Fermentation

Saponification

The flavour of amylacetate is

Choose an answer

Orange

Apricot

Banana

Pineapple

Which halogen will react spontaneously with Au(s) to produce Au³⁺

Choose an answer

Br₂

F₂

I₂

Cl₂

Aluminum reacts with nitrogen to form

Choose an answer

AIN

Al₂N

Al₂N₃

Al₄N₆

S_N2 reactions can be carried out with

Choose an answer

Primary alkylhalide

Secondary alkyhalide

Tertiary alkylhalide

All of these

Typical transition element is

Choose an answer

Sc

CO

Ra

Y

Which gas is cause of Asthma

Choose an answer

O₃

O₂

SO₂

CO₂

Vinyl acetlylene reach with HCl to form

Choose an answer

Polycetylene

Benzene

Chloroprene

Divinylacetylene

The brown gas formed, when metal reduce HNO₃

Choose an answer

NO

NO₂

N₂O₃

N₂O₅

Which is a secondary pollutant

Choose an answer

Carbonic acid

CO₂

SO₂

CO

Which is not an ore of iron

Choose an answer

haematite

Magnetite

limonite

Cassiterite

Water is disinfected by a substance to avoid toxification

Choose an answer

KMnO₄

Alums

O₃

Cl₂

Amongst the following, the compound that can be most readily sulphonated is

Choose an answer

toluene

benzene

nitrobenzene

chlorobenzene

Formalin is a 40% solution of

Choose an answer

CH₃CHO

CH₃OH

HCHO

CH₃OCH

Which one has yellow or orange cyrstalline ppt

Choose an answer

Acetone hydrazone

2, 4 DNPH

Ethanal oxime

Bisulphite addition product

Which one is not property or uses of mustard gas

Choose an answer

Used in 1st world war

Powerful vesicant

High boiling liquid

High boiling gas

Which compound is formed, when CH₃OH reach with CH₃- Mg -Br

Choose an answer

Ethane

Methane

Ethanol

Acetone

The fiber which is made from acrylonitrile as monomer

Choose an answer

PVC

Polyester fiber

Rayon fiber

Acrylic fiber

Isopropyl alcohol on oxidation gives

Choose an answer

Acetaldehyde

Acetone

Ether

Propene

Which catalyst is used Friedel Crafts reactions

Choose an answer

AlCl₃

BeCl₂

NaCl

HNO₃

Formula of choloroform is

Choose an answer

CH₃Cl

CCl₄

CH₂Cl₂

CHCI₃

The presence of a double bond in a compound is the sign of.

Choose an answer

Saturation

Unsaturation

Substitution

None of these

------------- does not belong to Alkaline-Earth metals

Choose an answer

Be

Ra

Ba

Rn

Which one is chlorous acid

Choose an answer

HCIO

HCIO₂

HCIO₃

HCIO₄

An element that has high ionization energy and tends to be chemically inactive would most likely to be

Choose an answer

an alkali metal

a transition element

a noble gas

a halogen

Which is not a calcarious material

Choose an answer

Clay

Limestone

Marble

Chalk

Amongst the following, the compound of that can be most readily sulphonated is

Choose an answer

Toluene

Benzene

Nitro-benzene

Chloro-benzene

The benzene molecule contains

Choose an answer

three double bonds

two double bonds

one double bond

delocalized pie-electron charge

What is %age of calcium phosphate in bone ash

Choose an answer

20

40

80

60

Acetone reacts with HCN to form cyanohydrin it is an example of

Choose an answer

Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic subtitution

-SH Functional group is called

Choose an answer

Cyano

Mercapto

Nitro

Carboxyl

Starch is

Choose an answer

Monosaccharide

Disaccharide

Polysaccharide

Oligosaccharide

The word paper is derived from the name of which reedy plant

Choose an answer

Rose

Sun flower

Papyrus

Water

Kaolin is a mineral of

Choose an answer

Carbon

Magnesium

Silicon

Aluminium

The macronutrients are required in quantities ranging from

Choose an answer

4-40 kg per acre

10-100 kg per acre

5-100 kg per acre

5-200 kg per acre

The aqueous solution of Borax

Choose an answer

Acidic

alkaline

Amphoteric

manual

Methyl alcohol is not used

Choose an answer

As a solvent

As an anti freezing agent

As a substitute for petrol

For denaturing of ethyl alcohol

Aromatic hydrocarbons are the derivatives of

Choose an answer

Normal series of paraffins

Alkene

Benzene

Cyclohexane

Which catalyst is used in contact process

Choose an answer

Fe₂O₃

V₂O₅

SO₃

Ag₂O

The pH of unpolluted rain water should be

Choose an answer

5.00

5.60

6.50

7.00

The state of hybridization of "C" in ethane is

Choose an answer

SP

sp²

dsp²

sp³

How many zones through which the charge passes in a rotary kiln

Choose an answer

4

3

2

5

Which compound is called universal solvent

Choose an answer

CH₃OH

C₂H₅OH

CH₃O CH₃

H₂O

Ammonium Nitrate fertilizer is not useful for

Choose an answer

Wheat

Cotton

Sugan cane

Paddyrice

Thickness of atmosphere is about how much kilometer above the surface of warth

Choose an answer

100 km

1000 km

10,000 km

unlimited

Which of the following gives acidic oxide

Choose an answer

N

As

Sb

Bi

Which of the following element is not present in all proteins

Choose an answer

Carbon

hydrogen

Nitrogen

Sulphur

------------- metal is used in the Thermite process because of its reactivity

Choose an answer

Tron

Copper

Aluminium

Zinc

Who gave the law of Triads in 1829?

Choose an answer

Dobereiner

Mosely

Newland

Mendeleev

Select from the following the one which is Alcohol

Choose an answer

CH₃CH₂OH

CH₃OCH₃

CH₃COOH

CH₃.CH₂.Br

Formula of chloroform is

Choose an answer

CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

Which is used in the leather industry

Choose an answer

Borax

Boric acid

Boric oxide

Tetra Boric acid

Which of the following has highest M.P

Choose an answer

Aluminium

Silicon

Phosphorus

Sulphur

During Nitration of Benzene the active nitrating agent is

Choose an answer

NO₃

NO₂⁺

NO₂

HNO₃

S_N2 mechanism involves

Choose an answer

1st order kinetics

2nd order kinetics

3rd kinetics

zero order kinetics

Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell

Choose an answer

H₂

Ba

Ra

Rn

------------------- is not a nucleophile

Choose an answer

H₂O

NO₃

BF₃

NH₃

The flavor of octylacetate is

Choose an answer

Orange

Apricot

Banana

Jasmine

Tincal is a mineral of

Choose an answer

Al

C

Si

B

The main pollutant of leather tanneries in the waste water is due to

Choose an answer

Lead

Chromium VI

Copper

Chromium III

Which of the following is not a fatty acid

Choose an answer

Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

In water the concentration of dissolved O₂should be

Choose an answer

1-3 ppm

2-4 ppm

4-8 ppm

8-12 ppm

Which one of following is used in cosmetics

Choose an answer

Talc

Asbestos

Sodium sulphate

Aluminium Sulphate

The basis of modern periodic table is

Choose an answer

Electron affinity

Atomic mass

Ionization Potential

Atomic number

Which of the following is not an amino acid

Choose an answer

Aspartic acid

Lysin

Alanine

Aniline

Which one is an incomplete period

Choose an answer

4th

5th

6th

7th

The process used to improve quality of gasoline

Choose an answer

Thermal Cracking

Reforming

Combination

Steam Cracking

Which one is the heterocyclic compound of oxygen

Choose an answer

Pyrridine

Parrole

Furan

Thiophene

Gold dissolves in "Aqua Regia" due to formation of Halide. Point out correct halide

Choose an answer

AuF₃

AuCl₃

AuBr₃

AuI₃

Which of the following acid can be used as a catalyst in Friedel Craft's reactions

Choose an answer

AlCl₃

HNO₃

BeCl₂

NaCl

Catalyst used to reduce carboxylic acid to alcohol is

Choose an answer

H₂/ Ni

H₂/ pt

NaBH₄

LiAIH₄

Which one of the following gases is used for artificial ripening of fruits

Choose an answer

Ethene

Ethyne

Methane

Propane

The presence of a double bond in a compound is the sign of

Choose an answer

Saturation

Un-saturation

Substitution

None of these

f-block elements are also called

Choose an answer

non typical transition elements

outer transition elements

normal transition elements

inner transition elements

----------- compound shows extensive hydrogen bonding with water

Choose an answer

C₂H₆

H₂S

C₂H₅OH

CH₃Cl

Which one the following a dihydric alcohol

Choose an answer

Ethanol

Cyclo hexanol

Glycerol

Glycol

SN₂reactions can be best carried out with

Choose an answer

primary alkyl halides

secondary alkyl halides

tertiary alkyl halides

All the three

Which one is neutral amino acid

Choose an answer

Lysine

Histidine

Glutamic acid

Valine

___________ is use as a cooling medium for nuclear reactors

Choose an answer

Ne

He

Ar

Kr

The electrophile in Aromatic sulphonation is

Choose an answer

H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Which of the following noble gas is used for arc welding and cutting

Choose an answer

Helium

Argon

Xenon

Radon

Peroxyacetyl nitrate (PAN) is a irritant to human beings and it affects

Choose an answer

Eyes

Ears

Stomach

Nose

Linear shape is associated with set of hybrid orbitals

Choose an answer

SP

sp²

dsp²

sp³

The colour of transition metal complexes

Choose an answer

d-d transitions of electrons

paramagnetic nature of transition elements

ionization

loss of s-electron

Which halogen will react spontaneously with Au_(s)to produce Au³⁺

Choose an answer

Br₂

F₂

I₂

Cl₂

According to Lewis concept, ethers behave as

Choose an answer

Acid

Base

Nucleophile

Solvent

Ethanol can be converted into ethanoic acid by

Choose an answer

Hydrogenation

Hydration

Oxidation

Fermentation

Which compound is the most reactive

Choose an answer

Benzene

Ethene

Ethane

Ethyne

Plastics are pollution problem because many plastics

Choose an answer

are made from petroleum

are very inflammable

burn to produce toxic fumes

decompose to produce toxic products

The concept of atomic number was introduced by

Choose an answer

Alrazi

Mendeleeve

Moseley

Dobereiner

Formalin is

Choose an answer

10% solution of formaldehyde in water

20% solution of formaldehyde in water

40% solution of formaldehyde in water

60% solution of formaldehyde in water

Which of the following is non-typical transition metal

Choose an answer

Fe

Mn

Zn

Ni

Co-ordination number of Cu in

Choose an answer

Zero

Two

Four

Six

The strength of binding energy of transition elements depend upon

Choose an answer

number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

Bakelite is obtained from phenol by reacting with

Choose an answer

Acetal

Ethanal

Formaldehyde

Methanol

The carbon atom of a carbonyl group is

Choose an answer

sp hybridized

sp²hybridized

sp³hybridized

none of these

Woody raw material for paper pulp is obtained from

Choose an answer

Cotton

Bagasse

Poplar

Rice straw

Which electronic configuration corresponds to an element of group III-A of the Periodic Table

Choose an answer

1s²,2s²,2p⁶,3s²,3p¹

1s²,2s²,2p⁶,3s²,3p⁶,4s⁶

1s²,2s²,2p⁶

1s²,2s²,3s²,3p³

m-choronitro benzene is prepared by

Choose an answer

Nitration of chlorobenzene

Nitration of Benzene

Chlorination of Nitrobenzene

Nitration of m-chlorobenzene

Total number of d-block elements are

Choose an answer

10

20

30

40

Which of the following are alkaline earth metals?

Choose an answer

Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

Which is the least reactive of all the alkali metals

Choose an answer

Li

Na

K

Cs

The carbon atom of carbonyl group is hybridized

Choose an answer

Sp

Sp²

Sp³

dsp²

Phosphorus helps the growth of

Choose an answer

Root

Leaf

Steam

Seed

Which of the following is an addition polymer

Choose an answer

Polyester

Polystyrene

Nylon 6,6

Terylene

One of following is argillaceous material

Choose an answer

Marble

Clay

Lime

Marine Shell

Which compound show hydrogen bonding

Choose an answer

C₂H₆

C₂H₅Cl

CH₃OCH₃

C₂H₅OH

Which element has lowest melting point

Choose an answer

Beryllium

Magnesium

Calcium

Barium

The chief of aluminum is

Choose an answer

Na₃AlF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃.H₂O

Which reagent is used to reduce a carboxylic group to an alcohol

Choose an answer

N₂/ Ni

H₂/Pt

NaBH₄

LiAIH₄

Which one is alcohol in the following

Choose an answer

CH₃.CH₂.OH

CH₃.O.CH₃

CH₃COOH

CH₃.CH₂.Br

Which of the following hydrogen halide is the weakest acid in solution

Choose an answer

HF

HBr

HI

HCl

Which reagent will react with both aldehyde and ketones

Choose an answer

Grignard reagent

Tollen's reagent

Fehling's reagent

Benedict's reagent

The reactivity of Grignard's regent is due to

Choose an answer

Polarity of Mg-x bond

Polarity of C-Mg bond

Electro negativity of halogen atom

Presence of Mg-atom

Which is the strongest acid

Choose an answer

HCIO

HCIO₂

HCIO₃

HCIO₄

Micro-nutrient is required in quantity for plant growth ranging from

Choose an answer

4-40 gm

6-200 gm

6-200 kg

4-40 kg

Silver mirror test is given by

Choose an answer

Ethers

Ketones

Acids

Aldehydes

During the manufacturing process of cement the temperature of the decomposition zone goes up to

Choose an answer

600°C

800°C

1000°C

1200°C

Which of the following the highest hydration energy

Choose an answer

Li⁺

Na⁺

K⁺

Mg⁺⁺

In modern periodic table VI period contains elements

Choose an answer

8

18

10

32

Which of the following derivative cannot be prepared directly from acetic acid

Choose an answer

Acetamide

Acetyl choride

Acetic anhydride

Ethyl acetate

Which acid is used in the manufacture of synthetic fibre

Choose an answer

Formic acid

Oxalic acid

Carbonic acid

Acetic acid

Banana flavour is given by the ester

Choose an answer

Octyl acetate

Amyl butyrate

Amyl acetate

Ethyl butyrate

Which one is a disaccharide

Choose an answer

Glucose

Sucrose

Fructose

Cellulose

The anhydride of HCIO₄is

Choose an answer

CIO

CIO₂

CIO₃

CI₂O₇

Alcohol obtained by fermentation is only upto

Choose an answer

10%

12%

20%

95%

Boric acid cannot be used

Choose an answer

As antiseptic in medicine

For washing eyes

In soda bottles

For Enamals and Glazes

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

Choose an answer

Hund's rule

Markownikov's rule

Pauli's Exclusion Principle

Aufbau Principle

Which one of the following is a condensation polymer

Choose an answer

Polystyrene

Polyester

Polyethene

Nylon 6,6

When CO₂is made to react with ethyl-magnesium iodide followed by acid hydrolysis, the product formed is

Choose an answer

Propane

Propanoic acid

Propanal

Propanol

The state of hybridization of carbon atom in Ethyne

Choose an answer

sp

sp²

dsp²

sp³

The word alkali is derived from which language

Choose an answer

Arabic

Greek

French

German

Which of the following is not directly prepared from CH₃COOH

Choose an answer

Ethyl acetate

Acetyl chloride

Acetic anhydride

Acetamide

Which of the following is a typical transition metal

Choose an answer

Sc

Y

Ra

Co

Cannizzaro's reaction is not given by

Choose an answer

Formaldehyde

Acetaldehyde

Benzaldehyde

Trithylacetaldehyde

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

Choose an answer

fibre

plastic

varnish

polyamide resin

Which is most difficult to be oxidized

Choose an answer

CH₃CHO

CH₃COCH₃

HCHO

C₂H₅CHO

Which one does not belong to the alkaline earth metals

Choose an answer

Be

Ba

Ra

Rn

The general formula for Alkene having one double bond is

Choose an answer

C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2

The state of hybridization in ethene molecule is

Choose an answer

dsp²

sp³

sp²

sp

The news paper can be recycled again and again as many times as

Choose an answer

5

3

4

2

Which of these polymers is a synthetic polymer

Choose an answer

Animal fat

Starch

Cellulose

polyester

Which enzyme is not involved in fermentation of starch

Choose an answer

Zymase

Urease

Invertase

Diastase

Elements of Groups IIA are called

Choose an answer

Alkali metals

Alkaline earth metals

Coinage metals

Halogens

Which of the following has highest boiling point

Choose an answer

Methanal

Ethanal

Propanal

2-hexanone

Laughing gas is chemically

Choose an answer

NO

NO₂

N₂O

N₄O₄

The strength of binding energy of transition elements depends upon

Choose an answer

number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

Aluminum oxide is

Choose an answer

acidic oxide

basic oxide

amphoteric oxide

none of these

Which metal is redered passive by HNO₃due to formation of a film of metal oxide over the metal

Choose an answer

Pt

Sn

CO

Mn

Which woody raw material is used for the manufacture of paper pulp

Choose an answer

Cotton

Biogases

Rice straw

Poplar

The nature of lysine amino acid is

Choose an answer

Acidic

Basic

Amphoteric

Natural

Which reaction is disproportionate reaction

Choose an answer

Aldol Condensation

Cannizzaros's reaction

Haloform reactions

Acid-catalyzed reactions

Which is the longest periodic table

Choose an answer

4

5

6

7

Which of the following are mono-saccharides

Choose an answer

Fructose

Sucrose

Stach

Cellulose

Number of elements in the first period of the periodic table is

Choose an answer

2

8

14

18

In which of following processes are small organic molecules made into macromolecules

Choose an answer

the cracking of petroleum fractions

the fractional distillation of crude oil

the polymerization of ethene

the hydrolysis of proteins

Bleaching powder may be produced by passing chlorine over

Choose an answer

calcium carbonate

hydrated calcium sulphate

calcium hydroxide

magnesium hydroxide

The anhydride of HCIO₄is

Choose an answer

CIO₃

CIO₂

Cl₂O₅

Cl₂O₇

A single chloride free radical can destroy how many ozone molecules

Choose an answer

100

100,000

100,00

unlimited

When methane reacts with Cl₂in the presence of diffused light the products obtained are

Choose an answer

Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a, b, c

Which compound is the most reactive

Choose an answer

Benzene

Ethene

Ethane

Ethyne

Organic compound having fruity smell are

Choose an answer

Caboxylic acid

Alcohols

Ethers

Esters

Chlorine heptoxide (CI₂O₇) reacts with water to form

Choose an answer

Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Which compound shows maximum hydrogen bonding with water

Choose an answer

CH₃OH

C₂H₅OH

CH₃- O - CH₃

C₆H₅OH

Which of these polymers is an addition polymer

Choose an answer

Nylon 6, 6

polystyrene

Terylene

epoxy resin

Chile saltpeter has the chemical formal

Choose an answer

NaNO₃

KNO₂

Na₂B₄O₇

Na₂CO₃.H₂O

The most reactive Alkyl halide is

Choose an answer

Alkyl Iodide

Alkyl Bromide

Alkyl fluoride

Alkyl Chloride

Which the correct statement

Choose an answer

Cl^-is smaller than Cl atom

Cl^-(Ion) and Cl (atom) are equal in size

Na⁺is smaller than Na atom

Na⁺is larger than Na atom

Which is the second most abundant element in the universe

Choose an answer

H

He

CO

C

The structure of Benzene is

Choose an answer

Hexagonal irregular

Tetrahedral

Trigonal planner

Hexagonal planner

During nitration of benzene, the active nitrating agent is

Choose an answer

NO₃

NO₂⁺

NO₂^-

HNO₃

The oxides of beryllium are

Choose an answer

Basicity

Rancidity

Amphoteric

none of all

Ecosystem is smaller unit of

Choose an answer

Lithosphere

Hydroshpere

Amosphere

Biosphere

Ecosystem is a smaller unit of

Choose an answer

lithospher

hydroshper

atmosphere

biosphere

Vegetable oils are

Choose an answer

Polyesters

Glycerides of unsaturated fatty acids

Essential oils

Fatty acids

Cannizzaro's reaction is given by

Choose an answer

Acetaldehyde

Formaldehyde

Propanal

Propanone

The percentage of carbon in different types of iron products is in the order of

Choose an answer

cast iron > wrought iron > steel

wrought iron > steel > cast iron

cast iron > steel > wrought iron

cast iron = steel > wrought iron

Aluminium oxide is

Choose an answer

Acidic oxide

Baric oxide

Amphoteric oxide

None of these

Out of all the elements of Group V-A the highest ionization energy is possessed by

Choose an answer

N

P

Sb

Bi

The reactivity order of alkyl halides for a particular alkyl group is

Choose an answer

Fluoride > Chloride > Bromide > iodide

Chloride > Bromide > Fluoride > iodide

Bromide > iodide > chloride > Fluoride

Iodide > Bromide > Chloride > Fluoride

Alkyl halides are considered to be very reactive compounds towards nucleophile because

Choose an answer

They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bed leaving group

They have a nucleophilic carbon and a good leaving group

For which mechanisms, the first step involved is the same

Choose an answer

E₁and E₂

E₂and SN₂

E₁and E₂

E₁and SN₁

Which compound is the most reactive one

Choose an answer

benzene

ethene

ethane

ethyne

The solution of which acid is used for seasoning of food

Choose an answer

Benzoic acid

Butanoic acid

Formic acid

Acetic acid

The oxidation of NO in air produces

Choose an answer

N₂O₃

NO₂

N₂O₃

N₂O₄

Which of the following statement is correct

Choose an answer

Na atom is smaller than Na⁺

Na atom is larger than K atom

F atom is smaller than F^-

F atom is larger than F^-

Co-ordination number of Pt in Pt Cl(NO₂)(NH₃)₄

Choose an answer

2-

4

1

6

Which compound will have the maximum repulsion with water

Choose an answer

C₆H₆

C₂H₅OH

C₃H₇OH

CH₃OCH₃

--------------- element forms an ion with charge 3⁺

Choose an answer

Beryllium

Aluminium

Carbon

Silicon

Oxidation of NO in air produces

Choose an answer

N₂O

N₂O₃

N₂O₄

N₂O₅

The total number of transition element is

Choose an answer

10

14

40

58

Hydrogen bond is the strongest between the molecules of

Choose an answer

HF

HCl

HBr

HI

The word paper is derived from the name of which reedy plant

Choose an answer

Rose

Sun flower

Papyrus

Water Hyacinth

Which of these polymers is a synthetic polymer

Choose an answer

Animal fat

Starch

Cellulose

Polyester

Rectified spirit contains alcohol about

Choose an answer

80%

85%

90%

95%

Which of the following is non-typical transition element

Choose an answer

Cr

Mn

Zn

Fel

A caboxylic acid contains

Choose an answer

a hydroxyl group

a caboxyl group

a hydroxyl and carboxyl group

a carboxyl and an aldehyde group

Elimination Bimolecular reactions involve

Choose an answer

Second order kinetics

First order kinetics

Third order kinetics

Zero order kinetics

The Milk of magnesia is used for the treatment of

Choose an answer

Basicity

Rancidity

Acidity

Jaundance

Grignard's reagent is reactive due to

Choose an answer

the presence of halogen atom

the presence of Mg atom

the polarity of C-Mg bond

none of the above

In t-butyl alcohol, the tertiary carbon is bonded

Choose an answer

Three hydrogen atoms

Two hydrogen atoms

One hydrogen atom

No hydrogen atom

Micronutrients are required in quantity ranging from

Choose an answer

4g-40g

6g-200g

6kg-200kg

4kg-40kg

Which of the following gas will turn lime water milky

Choose an answer

Cl₂

NO₂

CO

CO₂

The resonating contributing structures of Benzene are

Choose an answer

2

3

5

7

Vinyl acetylene combines with HCl to form

Choose an answer

Polyacetylene

Benzene

Chloroprene

Divinyl acetylene

Acetic acid manufactured by

Choose an answer

Distillation

Fermentation

Ozonolysis

Esterification

Which gas is used for artificial ripening of fruits

Choose an answer

Ethene

Metheane

Propane

Ethyne

Phosphorous helps the growth of

Choose an answer

root

leave

stem

seed

Which of the following element has lowest ionization energy

Choose an answer

Beryllium

Boron

Carbon

Oxygen

-------------------- is Alcohol in the following

Choose an answer

CH₃.CH₂.OH

CH₃.O.CH₃

CH₃COOH

CH₃.CH₂.SH

Synthetic rubber is made by polymerization of

Choose an answer

Vinylaecetate

Acetylene

Divinylacetylene

Chloroprene

Point out the element which forms super oxide

Choose an answer

Li

Na

K

C

Group VI-B of transition elements contains

Choose an answer

Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

In primary alkyl halides, the halogen atom is attached to a carbon which is further attached to how many carbon atoms

Choose an answer

Two

Three

One

Four

The general formula for Alkanes is

Choose an answer

C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2

The most metallic elements from the following is

Choose an answer

Arsenic

Oxygen

Antimony

Bismuth

Nelson's cell is used to prepare

Choose an answer

NaOH

Na₂CO₃

Na metal

NaCl

The mineral CaSO₄.2H₂O has the general name

Choose an answer

Dolomite

Gypsum

Calcite

Epsom Salt

Benzene cannot undergo

Choose an answer

Substitution reactions

addition reactions

oxidation reactions

elimination reactions

The bond angle between any two SP²Hydridized orbitals is of

Choose an answer

180°

109.5°

120°

107.5°

Which one is perchloric acid

Choose an answer

HClO

HClO₃

HClO₄

Which of the following is a reddish brown gas

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N₂O₃

NO₂

N₂O₃

N₂O₅

Which halogen occurs naturally in a positive oxidation state

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Fluorine

Chlorine

Bromine

Iodine

In group V-A elements the most electronegative elements is

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Sb

N

P

As

Group VI B to transition elements contains

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Zn, Cd, Hg

Fe, Ru, OS

Cr, MO, W

Mn, Te, Re

The pH of truly acidic rain is

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7-6.8

6.5-6

6-5.6

less than 5

Dolomite is a carbonate of

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Be

Mg

Na

Ba

CO₂H is a functional group as

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Alkoxy

Carbonyl

Carboxyl

Hydroxyl

Which elements are needed for healthy growth of plants

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N,S,P

N,Ca,P

N,P,K

N,K,C

For ----------------- Mechanism, the first step involved is the same

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E1 and E2

E2 and S_N2

S_N1 and S_N2

E1 and S_N1

The element of 2nd period, which has highest ionization energy from the following is

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Be

C

N

O

Which set of Hybrid orbital has planner triangular shape

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sp

sp²

dsp²

sp³

Which one is not a meta directing group

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-COOH

-CHO

-COR

-NH₂

Which of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

Which of the following elements is not present abundantly in earth's crust

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Silicon

Aluminium

Sodium

Oxygen

Which of the following is Ortho and Para directing group

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-I

-CHO

-COR

-NH₂

Maximum number of unpaired electrons is in

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O₂

O₂⁺

O₂^-

O₂^2-

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

Preparation of vegetable ghee involves

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Halogenation

Hydrogenation

Hydroxylation

Dehydrogenation

When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

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propane

propanoic acid

propanal

propanol

Which metal oxide is insoluble in water

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MgO

CaO

SrO

BaO

The brown gas formed when metal reduces HNO₃

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N₂O₅

N₂O₃

NO₂

NO

Which one of the following is not an alkali metal

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Francium

Caesuym

Rubidium

Radium

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

The pH range of the acid rain is

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7-6-5

6.6-6

6-5.6

less than 5

Which one of the following does not belong to alkaline earth metals

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Be

Ra

Ba

Rn

Which element form an ion with charge +3

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Beryllium

Aluminum

Carbon

Sillicon

Correct order according to atomic size in the following is

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Na > K

Be > Mg

O > N

Cl > F

Which reaction is disproportionate reaction

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Aldol Condensation

Cannizzaros's reaction

Haloform reactions

Acid Catalyzed reactions

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

Mild steel contains carbon percentage

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0.1 - 0.2%

0.3 - 0.7%

0.7 - 1.5%

1.6 - 2.0%

Which three elements are needed for the healthy growth of plants

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N,S,P

N,Ca,P

N,P,K

N,K,C

The nitrogen present in some fertilizers helps plants

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to fight against diseases

to produce fat

to undergo photosynthesis

to produce protien

The catalytic oxidation of methane produces

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CO + H₂O

CO₂+ H₂O

C₂+ H₂O

H₃C - OH

The avoid the formation of toxic compounds with chlorine which substance is used for disinfecting water

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KMnO₄

O₃

Alums

Chloramines

Which compound is more soluble in water

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C₂H₅OH

C₆H₅OH

CH₃COCH₃

n - hexanol

Acetic acid is manufactured by

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distillation

fermentation

ozonalysis

esterification

Which one of the following is an amide

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(NH₂)₂CO

NH₂.CH₃

C₆H₅NH₂

N(CH₃)₃

Cyanogen chloride reacts with ethyl magnesium bromide to give

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CH₃CH₂Cl

CH₃CH₂Br

C₄H₁₀⁺

CH₃CH₂CN

Which of the following compounds will not give Iodoform test on treatment with I₂/ NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentanone

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects

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eyes

ears

stomach

nose

Aldehyde react with hydroxyl amine in acidic solution to give

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An oxime

Aldol

Polymer

Acetic acid

Out of all the elements of group VA, the highest ionization energy is possessed by

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N

As

Sb

Bi

Out of all the elements of groups VI-A the highest melting and boiling points is shown by the element

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Te

Se

S

Po

Nylon 6,6 is obtained by the reaction of hexamethylene diamine with

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Acetic acid

Adipic acid

Viny chloride

Acetyl chloride

Aldehydes and ketones can be defected by

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2, 4 DNPH test

Tollen's test

Sodium Nitro prusside test

Benedicts solution test

Formula of marsh gas is

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CH₄

C₂H₆

C₃H₆

C₄H₁₀

The most electronegative element of group V-A is

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N

P

Sb

Bi

Which one of halogens is a liquid

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F₂

Cl₂

Br₂

I₂

Ethers show the phenomenon of

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Position Isomerism

Functional group isomerism

Metamerism

Chain isomerism

The most reactive alcohol when O-H bond breaks is

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Tertiary alcohol

Secondary alcohol

Primary alcohol

Methyl alcohol

Which metal is used in the thermite process because of its activity

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Iron

Copper

Aluminium

Zinc