Online Test

Question # 1

Which of the following result in discovery of proton?

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cathode rays

canal rays

x-rays

alpha rays

Tyndall effect is shown by:

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sugar solution

paints

jelly

chalk solution

Which one is least reactive non-metal?

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P

C

CI

F

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

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covalent

ionic

polar covalent

coordinate covalent

Which one of the following is not an electrolytic cell:

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Down cell

Galvanic cell

Nelson' cell

Both a and c

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 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

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 empirical formula of glucose is

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CHO

CH2O

C2HO

CHO2

The atomic number of potassium is:

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11

15

18

19

The lowest energy level is

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K

L

M

N

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

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2

4

6

8

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

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

Which one is least oxidizing agent?

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F

CI

I

Br

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 a triatomic molecule

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Sodium chloride

Water

Chalk

Glucose

The molar mass of H₂SO₄ is:

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98 g

98 amu

9.8 g

9.8 amu

Non-metals do not reaction with

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Strong bases

Concentrated acids

Dilute acids

Salts

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

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Brass

Fog

Cheese

Air

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

The valency of nitrogen is

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1

2

3

4

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

The cathode of Nelson's cell is made up of

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C

Zn

Cu

Fe

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

The value of Planck's constant is

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6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

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

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

It is heterogeneous mixture

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Sand

Milk

Air

Brass

Which pair of compounds is soluble?

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Ether and water

KCI and water

Benzene and water

Petrol and water

How many covalent bond does C₂H₂ molecule have?

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two

three

four

five

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

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

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

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0.15

0.18

0.21

0.24

The no.of neutrons in deutrium is

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1

2

3

4

The SI unit of pressure is:

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N

N/m²

Pascal

atm

Which one is a solution?

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Carbonated drinks

Sugar

Benzene

Vineger

Identify when pair has polar covalent bonds:

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O₂ and Cl₂

H₂O and N₂

H₂O and C₂H₂

H₂O and HCI

Which one of the following gas diffuses faster?

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hydrogen

helium

fluorine

chlorine

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

The no. of periods in modern periodic table are

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7

11

18

23

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

The no.of elements in the first period is

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2

8

18

23

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

In peroxides, the oxidation no. of O is

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+1

-1

+3

-3

D-block consists of:

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4th,5th & 6th periods

2nd, 3rd & 4th periods

1st, 2nd, & 3rd periods

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

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

A binary solution consists of:

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One component

Two components

Three components

Many components

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

Which one of the following halogen has lowest electronegative?

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fluorine

chlorine

bromine

iodine

Effusion is a property of:

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Gases

LIquids

Solids

Plasma

Along the period which one of the following decrease:

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Atomic radius

ionization energy

electron affinity

electronegative

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

The transition temperature of sulphur is:

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96 °C

250 °C

18 °C

218 °C

Metal oxides are

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Amphoteric

Basic

Acidic

Neutral

The example of solid solute in gas solvent is

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butter

Sugar in water

Smoke in air

Opals

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

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Carbon monoxide

Oxygen

Nitrogen

Argon

The absolute zero means:

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273.15 °C

-273.15 °C

0 °C

-373.15 °C

Which one of the following is the lightest metal?

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Calcium

Magnesium

Lithium

Sodium

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

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

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Sodium

Magnesium

Iron

Calcium

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 is moderate reactive metal?

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Pb

Na

Ca

Mg

Which has metallic bond?

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H

Na

HCI

P

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

The molecular mass of water is

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16 amu

14 amu

18 amu

20 amu

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

Which one of the following pair has the same mass?

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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

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

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

Which one metal is least reactive?

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K

Fe

Cu

AI

How many time liquids are denser than gases?

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100 times

1000 times

10,000 times

100,000 times

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

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

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

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

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2

4

8

2 or 8

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

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1

6

7

8

The most common example of corrosion is:

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Chemical decay

Rusting of iron

Rusting of aluminum

Rusting of tin

Which one of the following is heterogeneous mixture?

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milk

ink

milk of magnesia

sugar solution

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

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 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

The number of isotopes of carbon are

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1

2

3

5

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

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

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

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Phosphorous

Sulphur

Graphite

Iodine

First energy level is denoted by:

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K

L

M

N

The symbol of barium is:

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Ba

Bi

Br

B

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

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3

6

9

12

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 solubility of which salt increases in heating?

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Li₂SO₄

Ce₂(SO₄)₃

NaCI

KCI

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

Which is a polar molecule?

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HCI

H₂

CI₂

O₂

Halogens with metals for

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Ionic bond

Covalent bond

Dative covalent bond

Metallic bond

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

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Hydrogen

Nitrogen

Sulphur

Phosphorus

Mendeleev periodic table was based upon the:

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electronic configuration

atomic mass

atomic number

completion of a subshell

The cathode of Daniel cell is made up of

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Zn

Cu

AI

C

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

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1

2

4

7

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

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Alkall metals

Alkaline earth metals

Translation metals

Noble gasses

Transition elements are:

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all gases

all metals

all non-metals

all metalloids

Solid particles possess which one of the following motions?

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rotational motions

vibrational motions

translation motions

both translational and vibrational motions

The practical unit of concentration is

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%v/v

%v/m

%m/m

M

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

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CH⁴

KBr

CO²

H₂O

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

Sort out a compound from the following

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Air

Salt

Ice-cream

Iron

Which one is not a property of electrolytic cell?

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It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

Which one metal can be cut with a knife?

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Na

Mg

AI

Ca

A solution whose molarity is known is called:

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Dilute solution

Concentrated solution

Saturated solution

Molar solution

One atmospheric pressure is equal to how many pascals?

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101325

10325

106075

10523

Which has lowest density?

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liquids

Solids

Gases

Plasma

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

Which shows Tyndall Effect?

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Slution

Colloid

Suspension

True solution

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

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catalyst

coolant

reactant

absorber

The reverse of evaporation is:

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Boiling

Diffusion

Condensation

Freezing

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 will show negligible effect of temperature on its solubility?

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KCI

KNO³

NaNO³

NaCI

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

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10-2 atm

10-4 atm

10-6 atm

10-8 atm

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

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Graphite

Phosphorus

Iodine

Diamond

Which element has highest electronegativity?

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CI

F

Br

I

All of the following are tri-atomic molecules except:

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H²

O³

H²O

CO²

The p subshell has:

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one orbital

two orbitals

three orbitals

four orbitals

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

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1

2

3

4

Which molecules is donor in nature?

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H₂

NH₃

O₂

HF

Electropositive character depends upon:

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Atomic size

Nuclear charge

Ionization energy

Electron affinity

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

Mist is an example of solution:

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liquid in gas

gas in liquid

solid gas

gas in solid

For diagnosis of goiter in thyroid gland we use

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Co-60

C-14

I-131

Sr-90

Oxidation means

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Gain of oxygen

Removal of oxygen

Gain of hydrogen

Gain of electrons

Cathode rays are actually

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Electrons

Protons

Neutrons

Photons

All metals are solid except

Choose an answer

AI

Mg

Na

Hg

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

Octet rule is:

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description of eight electrons

picture of electronic configuration

covalent bonding

attaining of eight electrons

Brine is an aqueous solution of

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NaCI

NaOH

AgNO3

CaO

1 atm = ?

Choose an answer

1 pascal

760 mm of Hg

1 atm

1 Nm^-2

It is a good reducing agent

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Fe

H

C

O

The mass of one molecule of water is:

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18 amu

18g

18mg

18kg

Metal can form ions carrying charges:

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Uni-positive

Di-positive

Tri-Positive

All of them

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

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Sodium

Potassium

Calcium

Carbon

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

Smoke in air is the example of solution.

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Gas in Gas

Gas in liquid

liquid in Gas

Solid in Gas

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

Free radical is a

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Extremely stable

Extremely reactive

Extremely inert

All of these

Atoms of elements combine chemically to form:

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Mixtures

compounds

solutions

ions

Who discovered the proton?

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Goldstein

J.J Thomson

Neil Bohr

Ruther Ford

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

The isotopes of an element have different number of

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Electrons

Protons

Neutrons

Protons & Neutrons

The symbol of lead us

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As

Pb

Sb

Na

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

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

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cobalt-60

iodine-131

strontium-90

phosphorus-30

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

Which of the following can be separated by physical means?

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Mixture

Element

Compound

Radical

In period, ionization energy of elements

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Increases

Decreases

Remains constant

None of these

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

Which one of the following is brittle?

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Sodium

Aluminum

Selenium

Magnesium

Industrial chemistry deals with the manufacturing of compounds:

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in the laboratory

on micro scale

on commercial scale

on economic scale

Force per unit area is called:

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volume

pressure

weight

density

When U-235 breaks up, it produces?

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electrons

neutrons

protons

nothing

Which gas will diffuse faster than others?

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Hydrogen

Oxygen

Chlorine

Nitrogen

Which one of the following is not amorphous?

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rubber

plastic

glass

glucose

1 torr = ?

Choose an answer

1 mm of Hg

1 atm

760 mm of Hg

1 pascal

Deuterium is used to make:

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light water

heavy water

soft water

hard water

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

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covalent

ionic

coordinate covalent

metallic

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

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2

8

18

32

Which of the following is less malleable?

Choose an answer

Sodium

Iron

Gold

Sliver

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

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Li

Be

B

C

Which one of the following is not an electrolyte?

Choose an answer

sugar solution

sulphuric acid solution

Lime solution

Sodium chloride solution

One amu (atomic mass unit) is equivalent to:

Choose an answer

1.66x10^-24 mg

1.66x 10^-24g

1.66x10 g

1.66x10^-23mg

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

The mathematical formula of Charle's law is:

Choose an answer

PV = k

V/T = k

P = VT

T/V = k

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

Choose an answer

Oxygen

Aluminum

Silicon

Iron

The vapour pressure of a liquid increase with the:

Choose an answer

increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

The colour of calcium metal flame is

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Golden yellow

Brilliant white

Brick red

Light green

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

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

Which one of the following non-metal is lustrous?

Choose an answer

Sulphur

Phosphorus

Iodine

Carbon

Which one of the following solution contains more water?

Choose an answer

2M

IM

0.5M

0.25M

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

Choose an answer

zn

H⁺

C

H²

It is an ionic compound

Choose an answer

H2O

NaCI

CH4

HF

Metals lose their electrons easily because:

Choose an answer

They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

Which one of the following is liquid in solid solution?

Choose an answer

sugar in water

butter

opal

fog

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

Choose an answer

h/2π

n 2h/π

n h2/2π

n h/2π

The mathematical formula of Boyle's law is:

Choose an answer

PV = k

PT = k

V = kT

T = Vk

Which gas is emitted due to volcanic eruption?

Choose an answer

CO₂

SO₃

NO₂

H₂

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

Choose an answer

CO₂

O₃

NO₂

SO₂

Ethyl butanoate smells like.

Choose an answer

Apple

Pine apple

Lemon

Melon

Which of following dehydration of alcohols take place:

Choose an answer

NaOH

KOH

H₂SO₄

HCl

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

How many percentage of sunlight is absorbed by atmosphere gases.

Choose an answer

12%

18%

24%

30%

The coal in which the percentage of carbon is 60%

Choose an answer

Peat

Lignite

Bituminous

Anthracit

Hookworm is a parasite that infects the:

Choose an answer

large intestine

small intestine

stomach

liver

Water become hard because of:

Choose an answer

Ca+2

Mg+2

SO-24

all of these

Which one of the following does not contain proteins.

Choose an answer

In pulses

In Potatoes

In fruits

In eggs

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

Choose an answer

-58°C

-93°C

-61°C

-49°C

Water molecule has a structure:

Choose an answer

Ionic

Non polar

Tetrahedral

Polar

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

Choose an answer

1

2

3

4

The ability of carbon atoms to form chains is called.

Choose an answer

Isomerism

Catenation

Resonance

Condensation

Acid occurring in sour milk

Choose an answer

Citric acid

Lactic acid

Bytyric acid

Malic acid

In shoe polished, which chemical is used.

Choose an answer

Ethanol

Methanol

Carbon black

Formaldehyde

Main component of natural gas is

Choose an answer

Methane

propane

Butane

Propene

Dextrose is a crystallized:

Choose an answer

sucrose

lactose

glucose

fructose

The number of carbon atoms present in kerosene oil.

Choose an answer

8-12

9-12

10-12

11-12

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

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

Cause of diarrhoea among following is:

Choose an answer

Diarrhea

Cholera

Cryptosporidium

Typhoid

Pitch is black residue of.

Choose an answer

Coke

Coal tar

Coal

Coal gas

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

The sphere just above the Earth's surface is.

Choose an answer

Mescosphere

Stratosphere

Thermosphere

Troposphere

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

conjugate base of HCl is:

Choose an answer

HCl^-

CH

Cl

NH₃

Marsh gas is mostly :

Choose an answer

ethane

methane

butane

propane

All acids turn blue litmus.

Choose an answer

Red

Blue

Pinck

White

Vitamin B₁ (Thiamin) was discovered by.

Choose an answer

Hopkins

Funk

J.Watson

Davy

Wood contain the amount of carbon.

Choose an answer

70%

80%

60%

40%

Which one of the following is gas at room temperature:

Choose an answer

C2H6

C6H14

C6H6

C8H18

The major constituents of troposphere are:

Choose an answer

carbon dioxide and argon

nitrogen and oxygen

argon and oxygen

carbon dioxide and oxygen

PAN stands for

Choose an answer

Poly aniline nitrate

Proxy acetyl nitrate

Poly acetyl nitrite

Proxy acetyl nitrite

__________ acid cause acidity of stomach.

Choose an answer

Oxalic acid

Hydrochloric acid

Sulphuric acid

Nitric Acid

By which process alkenes are prepared from alcohols:

Choose an answer

Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

Acids have taste

Choose an answer

Bitter

Seetish

Sour

Saltish

Concentration is process of:

Choose an answer

Mixting technique

Separating technique

Boiling technique

Cooling techique

Almost all aircrafts fly in:

Choose an answer

troposphere

mesosphere

stratosphere

themosphere

Which disease cause liver inflammation?

Choose an answer

Typhoid

Jaundice

cholera

Hepatitis

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

Choose an answer

Carbonterachloride

Chloroform

Carbon Black

Chloromethane

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

Choose an answer

O₂

CO

CO₂

CO₃

Higher concentration of CO causes.

Choose an answer

Fatique

Headache

Both of them

None of them

_______ is the king of chemicals.

Choose an answer

Hydrochloric acid

Nitric Acid

Sulphuric acid

Phosphoric acid

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

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

Choose an answer

Acid

Base

Amphoteric

Neutral

Eye inflammation is caused by the deficiency of vitamin.

Choose an answer

Vitamin D

Vitamin C

Vitamin B

Vitamin A

Which of the following thing is a lewis base?

Choose an answer

NH₃

BF₃

H⁺

AlCl₃

Glucose and fructose are.

Choose an answer

Pentose

Triose

Hexoses

None of these

Organic compounds contain:

Choose an answer

ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Blonde hair contains compounds of:

Choose an answer

molybdenum

iron

titanium

copper

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

Choose an answer

Fractional Distilation

Destructive Distiation

Carbonization

Catenation

About 99% atmosphere's lies within:

Choose an answer

30 kilometre

35 kilometre

15kilometre

11 kilometre

Industrial effluents are highly

Choose an answer

Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

What gas is the major constituent of troposphere?

Choose an answer

Nitrogen

Oxygen

Hydrogen

Both a and b

Dilute acid react with carbonates the produce product except _________

Choose an answer

Salt

Water

Carbon di oxide

Hydrogen gases

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

Choose an answer

Five

Ten

Seven

Twelve

Hydrogen atoms preset in pentane are.

Choose an answer

10

12

14

16

The number of carbon atoms present in gasoline or petrol.

Choose an answer

5-10

6-10

7-10

8-10

___________ is not an acid:

Choose an answer

HCl

NH₃

H₂CO₃

H₂SO₄

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

The acid which is called king of chemicals.

Choose an answer

Sulphuric Acid

Nitric Acid

Hydrochloric acid

Acetic acid

Manufacturing of urea involves:

Choose an answer

2 steps

3 steps

4 steps

5 steps

Which one of the following gas has greater retaining capacity?

Choose an answer

O₂

N₂

CO

CO₂

Which is the natural sugar found in starchy food.

Choose an answer

Pentose

Dextrose

Hexose

All of them

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

Choose an answer

-OH

H⁺

Botha a and b

Covalent bond

The end product of oxidation of acetylene is .

Choose an answer

Oxalic acid

Glyoxal

Glycol

None of these

The gas use by plants to perform photosynthesis.

Choose an answer

O₂

CO₂

N₂

CO

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

Choose an answer

red

green

violet

discharged

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

Choose an answer

10%

20%

30%

40%

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

Which one of the following is a synthetic fiber:

Choose an answer

cotton

wool

nylon

silk

Dehydration means removal of.

Choose an answer

Water

Halogen

Hydrogen

All above.

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

Which is Pentahydroxy aldehydes of the following?

Choose an answer

Starch

Glucose

Fructose

Sucrose

Open chain compounds are also called:

Choose an answer

aliphatic compounds

alicyclic compounds

aromatic compounds

hydrocarbons

Composition of carbon in kerosene oil is.

Choose an answer

C₁₀-C₁₂

C₁₂-C₁₂

C₁₆-C₁₈

C₃₀-C₃₀

General formula of Alkyl radical is..

Choose an answer

C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-1

C_nH_2n-2

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

Choose an answer

lower stratosphere

middle stratosphere

upper stratosphere

troposphere

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

Choose an answer

Provide energy to the body.

Insulate our body from electric shock

Build brain cells

Regulate metabolism

|Which one is not an Arrhenius acid?

Choose an answer

HCl

H2SO₄

CO₂

HNO₃

Which of following is not amphoteric?

Choose an answer

H₂O

NH₃

HCO₃

SO₄

Catalytic converters convert.

Choose an answer

CO to CO₂

N₂ to NO

CO₂ to CO

N₂to NO₂

____________ is synthetic fiber.

Choose an answer

Cotton

Woal

Nylon

Silk

Which is present 85% in natural gas?

Choose an answer

Ethane

Propane

Methane

Butane

Boiling point of alcohol in centigrade is.

Choose an answer

68

78

118

128

Which one of the following does ot contain protein

Choose an answer

Pulses

Potatoes

Beans

eggs

Which gas in produced during ripening of bnabanas.

Choose an answer

Methane

Ethene

Acetylene

Carbon dioxide

Atmosphere is divided into;

Choose an answer

3 regions

4 regions

5 regions

6 regions

Water molecule had a structure;

Choose an answer

non-polar

polar

ionic

tetrahedral

A pollutant is a waste material that pollutes.

Choose an answer

Air

Water

Soil

All of them

General formula of Alkane is.

Choose an answer

C₁₀H_2n-2

C₆H₂₆

C₁₁H_2n-2

C_nH_2n-2

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

When acids react with metals which gas is evolved?

Choose an answer

H₂

O₂

Cl₂

N₂

Amino acid are linked to each other through.

Choose an answer

Hydrogen link

Ionic link

Gelatin link

Peptide link

The reaction goes from left to right , if:

Choose an answer

Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

How many units are in Pakistan for manufacturing of Urea.

Choose an answer

3

6

9

12

At which region all weather occurs?

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

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

About 99% of atmospheric mass lies in.

Choose an answer

35 km

30 km

15 km

16 km

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

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

Choose an answer

Thermosphere

Stratosphere

Mesophere

Thermosphere

Phenolphthalein produces red colour in

Choose an answer

Acid

Base

Both a and b

None of these

Which is not an air pollutant?

Choose an answer

CO₂

CO

SO₂

NH₃

For which reaction Kf is the rate constant?

Choose an answer

Forward reaction

Backward reaction

Upward reaction

Downward reaction

Acid reacting with metal sulphides, liberate gas.

Choose an answer

Oxygen

Hydrogen

Hydrogen Sulphide

Hydrogen Oxide

The number of carbon atoms present in petroleum gas.

Choose an answer

1-2

1-3

1-4

1-5

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

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 is not a part of flue gas?

Choose an answer

Furans

Dioxins

HCl

H₂SO₄

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

Choose an answer

One

Two

Three

Four

Bases gave taste:

Choose an answer

Bitter

Sweetsh

Sour

Saltish

The impurities associated with the minerals are known as:

Choose an answer

Metallurgy

Ores

Gangue

Compounds

the removal of which ion causes water softening.

Choose an answer

Na⁺

Mg²

Li⁺

K⁺

Soda lime is a mixture of..

Choose an answer

CaCl, + KOH

NaOH + CaO

NaOH + CaCl₂

Ca(OH)₂ + CaO

Matte is a mixture of:

Choose an answer

FeS and CuS

Cu₂O and FeO

Cu₂S and FeS

CuS and FeO

The % age of carbon in peat is :

Choose an answer

60%

70%

80%

90%

Chemical formula of hypochlorous acid is.

Choose an answer

HCl

HOCl

H₂CO₃

HF

Vibrious cholera causes.

Choose an answer

Choleera

Dysentery

Fluorsis

Hepatitis

General formula of carbohydrate is.

Choose an answer

C_n(H₂O)₆

CH

C_nH_2n

C₆H_2nO

What is pOH of 0.01 M solution of KOH?

Choose an answer

3

11

2

4

Number of discovered element till today are.

Choose an answer

140

118

90

16

Normaily rain water is weakly acidic because.

Choose an answer

SO₃

CO₂

CO₃

NO₂

Chalco-Pyrite is an ore of:

Choose an answer

Copper

Silver

Iron

Aluminium

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

The nature of enzyme is.

Choose an answer

Protein

Vitamin

Fats

Carbohydrate

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

Choose an answer

CH₄

C₂H₄

C₂H₆

C₂H₅

Amont the followign substitution reaction is characteristics of.

Choose an answer

Alkanes

Alkenes

Alkynes

None of these

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

Choose an answer

Proton

Electron pair

Neutron

Electron

Malic acid founds in:

Choose an answer

Apple

Fats

Rancid Butter

Oranges

Percentage of carbon in peat is.

Choose an answer

50%

60%

70%

80%

In hydrogenation of vegetable oil catalyst employed is.

Choose an answer

Ni

Pt

ZnO

Cr₂O₃

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.

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 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

The envelope of different gases around the earth is called.

Choose an answer

Atmosphere

Brosphere

Lithosphere

Hydrosphere

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

Choose an answer

1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

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

When glucose and fructose combine and forms.

Choose an answer

Starch

Cellulose

Sucrose

None of these

Uric Acid is present in

Choose an answer

Apple

Fats

Urine

Grapes

Which one is a pentahydroxy ketone?

Choose an answer

sucrose

glucose

fructose

lactose

If Qc = Kc the reaction goes in:

Choose an answer

Forward

Reverse

At equilibrium state

None

Which part of digestive system glucose absorb.

Choose an answer

Stomach

Liver

Small intestine

Large intestine.

The carbon contents in lignite is.

Choose an answer

80%

50%

60%

70%

Blast furnace usually used for the metallurgy of.

Choose an answer

Iron

Copper

Aluminum

Both a and b

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

Choose an answer

Glycogen

Glucose

Starch

Glycerol

Dynamic means, reaction is:

Choose an answer

In forward direction

Stop

In reverse direction

Still continuing.

We exhale gas in the atmosphere during respiration.

Choose an answer

Carbon dioxide

Oxygen

Nitrogen

Water

Compound of metal exist under earth crust are called.

Choose an answer

Ore

Gangue

Minral

None of these

Which one of the following is crystalline solid.

Choose an answer

Glucose

Starch

Cellulose

Glycogen

Ozone is an allotropic form of

Choose an answer

Carbon

Oxygen

Sulphur

Phosphorous

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

Choose an answer

1.698

1.397

12.31

12.61

Water has a maximum density at .

Choose an answer

10^oC

0^oC

4^oC

100^oC

The raw materials for the manufacturing of urea are.

Choose an answer

Ammonia

Carbondioxide

Limestone

a & b

Which one of the following does not contain starch

Choose an answer

Sugar cane

Maize

Barley

Potatoes

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

Choose an answer

CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

soap is the sodium salt of long chain.

Choose an answer

Amino acids

Fatty acids

Nucleotides

None of them

Latin word 'Acidus' means:

Choose an answer

sweet

salty

sour

bitter

Which of the following is fat soluble vitamin?

Choose an answer

Vitamin A

Vitamin E

Vitamin K

All of these

The percentage of ocean in world water is.

Choose an answer

50%

67%

97%

25%

Which of the following in insoluble in water.

Choose an answer

Benzene

NaCl

KCl

All of them

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 vitamins is water soluble?

Choose an answer

Vitamin A

Vitamin C

Vitamin D

Vitamin E

Which one of the following is used as jet fuel.

Choose an answer

Kerosene oil

Lubricating oil

Fuel oil

Diesel oil

Formula of palmitic acid is.

Choose an answer

C₁₅H₃₁COOH

C₁₂H₃₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

The number of carbon atoms present in fuel oil.

Choose an answer

14-18

15-18

16-18

17-18

The colour of litmus in a strong basic solution become.

Choose an answer

Yellow

Blue

Red

Colourless

Gypsum in water is.

Choose an answer

Sparingly soluble

Insoluble

Highly soluble

None of them

Basic solution have pH value.

Choose an answer

Less than 7

Greater than 7

equal to 7

None of these

The black residue of the coal tar is called:

Choose an answer

peat

lignite

pitch

matte

Alkanes give reaction only

Choose an answer

Addition

Decomposition

Substitution

Displacement

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

Choose an answer

hydrogen

oxygen

chlorine

nitrogen

Which process is responsible for ascending of water in roots:

Choose an answer

evaporation

transpiration

condensation

capillary action

Margarine is produced by adding hydrogen to vegetable oil at.

Choose an answer

2000 ^oC

100^oC

200^oC

1000^oC

In chemical reaction , the substances that combine are called.

Choose an answer

Reactants

Products

Equlibrium

Numerator

Which hepatitis is caused by contaminated water?

Choose an answer

Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis D

Ozone has a smell

Choose an answer

Bitter

Rotten egg

Sweat

None of them

Carbohydrates are synthesized by plants through.

Choose an answer

Respiration

Photosynthesis

Dehydrateion

Evaporation

Identify which one of the following compounds is a ketron?

Choose an answer

(CH₃)₂ CHOH

(CH₃)₂CHCl

(CH₃)₂CO

(CH₃)₂CHCl

The region of ozone decomposition in stratosphere is.

Choose an answer

20 km

30 km

40 km

50 km

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

Sodium zeolite is naturally occurring reason of .

Choose an answer

NaAl (SiO₃)₂

Na₂CO₃

CaCO₃

Na₂SIO₃

Chemical formula of matte will:

Choose an answer

Cu2S.FeS

Cu2S

Cu2O

FeS

The functional group- COOH is found in

Choose an answer

Carboxylic acid

aldehydes

alcohals

easter

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

Alkyl radical is derivative of

Choose an answer

Alkane

Alkene

Alkyne

All

Concentration is a .

Choose an answer

Mixing technique

Separating technique

Boiling technique

cooling technique

Petroleum fraction having composition C₅ to C₇ is.

Choose an answer

Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

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

Choose an answer

Sugar

Proteins

Fats

DNA

Stearic acid present in

Choose an answer

Apple

Fats

Urine

Grapes

Thermosphere lies beyond.

Choose an answer

Stratosphere

Troposphere

Mesosphere

Biosphere

In irreversible reaction, dynamic equilibrium:

Choose an answer

Never establishes

Establishes before the completion of reaction

Establishes after the completion of reaction

Establishes readily

Coal is blackish complex mixture of compounds of

Choose an answer

Carbon

Hydrogen

oxygen

All

Lactic acid founds in:

Choose an answer

Citrus fruits

Sour milk

Rancid Butter

Apple

Which disease cause when humans use water of industrial effluents.

Choose an answer

Cancer

Asthma

Jaundice

cholera

Marsh gas is mostly consisted of.

Choose an answer

Butane

Propane

Ethane

Methane

General formula of alkynes is:

Choose an answer

C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-2

General formula of alkenes.

Choose an answer

C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

The % age of carbon is coal is

Choose an answer

40-60

50-70

40-80

40-90

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

Choose an answer

CH₄

C₁₀H₂₀

C₂H₂

C₂H₄

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

Choose an answer

temperature

Pressure

concentration

density

The general formula of alkane is

Choose an answer

C_nH_2n+2

C_nH_2n-2

C_nH_2n

C_nH_2n+1

Just above the Earth's surface is

Choose an answer

Mesosphere

Stratosphere

Theremosphere

Troposphere

The color of Iodine is:

Choose an answer

Purple

Black

Red

Pink

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

Human body uses carbohydrates in the form of

Choose an answer

Glucose

Maltose

Fructose

Galatose

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

Choose an answer

Reactant

Products

Mass

Material

Amino acid are the building blocks of .

Choose an answer

Proteins

Carbohydrates

Vitamins

fats

Which disease is caused by polluted water.

Choose an answer

Cholera

Typhoid

Diarrhea

All of them

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

Choose an answer

CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

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

Choose an answer

Oxygen

Carbon dioxides

sulphur dioxide

Hydrogen

Methyl butanoate smells like;

Choose an answer

a pine apple

an apple

an orange

a lemon

Ammonia is prepared by the process .

Choose an answer

Ostwald

Haber

Clark

All

Who proposed "Law of mass action"?

Choose an answer

Newton

Boyle

Guldberg and waage

Lavoisier

the chemical formula of chalcopyrite is:

Choose an answer

Cu₂S

CuFe₂S

CuS

FeS

Ammonical brine is prepared by dissolving ammonia gas in.

Choose an answer

NaCl

CaCO₃

CaCl₂

Na₂SO₄

Gelatin protein is found in.

Choose an answer

Blood

Skin

Heart

Bones

Which is the essential sugar found in milk?

Choose an answer

Maltose

Lactose

Galactose

Starch

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

Choose an answer

Chemical states

Static state

Physical state

Dynamic equilibrium state

Permanent hardness is removed by adding.

Choose an answer

Na₂ zeolite.

Soda lime

Lime water

Quick lime

Photosynthesis process produce.

Choose an answer

Carbondioxide

Glucose and oxygen

Carbon di oxide

glucose and carbondoxide

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

Which helps in lowering of cholesterol level?

Choose an answer

Vitamin

Fiber

Carbohydratres

All of them

The 1st organic compound prepared in laboratory.

Choose an answer

Urea

NaCl

Thiourea

Pyridine

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

Choose an answer

NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

The plant use

Choose an answer

Carbon di oxide

Oxygen

Nitrogen

Sulphur

Concentration of copper are is carried out by process.

Choose an answer

Roasting

Forth floatation

Gravity sepration

Electrostatic separation

What is the POH of a 0.02 M Ca(OH)₂?

Choose an answer

1.698

1.397

12.31

12.61

___________ is not mineral acid.

Choose an answer

HCl

CH₃COOH

H₂SO₄

HNO₃

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

Ozone is beneficial for us as it

Choose an answer

Absorb infrared radiation.

Absorb Ultraviolet radiations.

Absorb Chlorofluorocarbons

Absorb Air pollulant

The rate of reverse reaction in the beginning.

Choose an answer

Slow

moderate

Very fast

Low

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

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

Choose an answer

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

The water which produces good lather with soap is called:

Choose an answer

soft water

hard water

heavy water

typical water

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

Choose an answer

Troposphere

Mesosphere

Stratosphere

Thermosphere

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

Choose an answer

Fractional distillation

Sublimation

Roasting

Destructive distillation

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

The substances formed during the chemical reaction are called.

Choose an answer

Product

Reactants

Radicals

Element

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

Choose an answer

H2

CO₂

SO₂

NH₃

pH of acid rain is:

Choose an answer

7-5

6-7

1-2

4-5

Main component of Natrual gas.

Choose an answer

CH₃

CH₄

C₂H₆

C₂H₂

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.

Which ion cause water hardness?

Choose an answer

Al²

Mg²

Fe²

Na²

The percentage of water in human body is.

Choose an answer

40%

50%

60%

70%

Froth flotation process is used to concentrate the ore on:

Choose an answer

Density basis

Concentration basis

Wetting basis

Magnetic basis

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

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

A salt always

Choose an answer

Contain ions

Contains water of crystallization

Dissolves in water

Forms crystals which conduct electricity

Water dissolves non-ionic compound by

Choose an answer

Ion-ion forces

Ion-dipole forces

Dipole -dipole forces

Hydrogen bonding.

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

Choose an answer

Infrared Radiations

Ultraviolet radiations

Chlorofluorocarbons

Air pollutants

Which carbohydrate is used directly by muscles for energy?

Choose an answer

Galactose

Lactos

Glucose

Fructose

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

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

Dehalogenation of Tetrahalides takes place in the presence of .

Choose an answer

K

Mg

Na

Zn dust

Thousand of amino acids polymerize to form.

Choose an answer

Carbohydrates

Proteins

Lipids

Vitamins

Which one is Lewis Acid?

Choose an answer

BF₃

AICI₃

FeCl₃

All of these

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

Choose an answer

Specific heat capacity

Surface tension

Excellent solvent action

Capillary action.

In dry cleaning, which chemical is used.

Choose an answer

Chloroform

Carbon tetachloride

Ecetaldehyde

Ethanol

The surface tension of water is:

Choose an answer

very low

moderate

high

zero

The unit of molar concentration:

Choose an answer

mol. dm^-2

mol. dm^-1

mol. dm

mol. dm^-3

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

Choose an answer

NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

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

Choose an answer

CH₄

C₁₀H₂₀

C₂H₄

C₂H₂

Dehydrohalogenation takes place in the presence of .

Choose an answer

NaOH aqueous

Alcoholic KOH

Aqeous KOH

Alcoholic NaOH

Which type of reactions do not go to completion?

Choose an answer

Irreversible reaction

Reversible reactions

Addition reactions

Decomposition reactions

General formula of alkyl radical is

Choose an answer

C_nH_2n+2

C_nH_2n-2

C_nH_2n+1

C_nH_2n

Dehydrohalogenation take place in the presence of.

Choose an answer

Aqueous NaOH

Alcoholic KOH

Aqueous KOH

Alcoholic NaOH

Water which produces good lather with soap is called.

Choose an answer

Soft water

Hard water

Heavy water

All 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

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

High concentration of which metal clogs the fish gills.

Choose an answer

Zinc

Aluminium

Sodium

Copper

The color of hydrogen Iodide is:

Choose an answer

Colourless

Black

Red

Pink

Active mass is expressed as:

Choose an answer

{ }

[ ]

( )

l l

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

Choose an answer

White crystalline solids

Soluble in water

Hydrolysable

Reducing is nature

Fertilizers are used to make up the deficiency of;

Choose an answer

oxygen and carbon

iron and magnesium

nitrogen and phosphorus

hydrogen and calcium

The substance formed during the chemical reaction are called.

Choose an answer

Products

Reactants

Radical

Element

There are ____________ types of salts.

Choose an answer

2

3

6

8

K_c is always equal to

Choose an answer

Rf/Rr

Kf /Kt

Kf/Kr

Rr/Rt

Which gas is used to prepare ammonia?

Choose an answer

N₂

O₂

Cl₂

S

Chemical formula of chloroform is :

Choose an answer

CH₂Cl₂

CH₃Cl

CHCl₃

CCl₄

Runcid butter has

Choose an answer

Foul smell

Rotten egg smell

Pungent smell

No smell

The organic compound used as drugs to control bleeding are.

Choose an answer

Vitamins

Proteins

Lipids

Glycerides

Which of the following is the hardest coal?

Choose an answer

Pear

Lignite

Bituminous

Anthracite

Eggs oils and fats contain vitamin .

Choose an answer

A

B

C

D

Ozone layer is not found is

Choose an answer

Upper stratosphere

Mid stratosphere

Lower stratosphere

All of them

Which colour of HI is ?

Choose an answer

Orange

Purple

Red

Colourless

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

The word acid is derived from the.

Choose an answer

Greek word

Latin word

English word

Arabic word.

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

Choose an answer

water

oil

benzene

petrole

Which one of the following are amorphous solids?

Choose an answer

Monosacchrides

Oligosaccharides

Polysaccharides

All of them

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

Metallurgy involves which of the following steps?

Choose an answer

Mining and enrichment

Reduction

Refining and casting.

All of these

Coal is the mixture of

Choose an answer

Hydrogen

Methane

Carbon monoxide

All

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

Choose an answer

CO₂

O₂

N₂

All of them

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

Conversion of wood into coal is called.

Choose an answer

Carbonization

Destructive distillation

Fractional distillation

All

50% dextrose contains approximate amount of energy.

Choose an answer

250 calories

16 Calories

170 calories

120 calories

Which one contains triple covalent bond?

Choose an answer

Pentane

Ethylene

Acetylene

All

Uric acid is found in

Choose an answer

Urine

Fats

Apple

Grapes

Which is not a poisonous gas?

Choose an answer

Ozone

Chlorine

Carbon di oxide

All of them

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

Choose an answer

Glucose

Sucrose

Starch

Cellulose

General formula of alcohols is:

Choose an answer

RCHO

ROH

O= R - C -OH

O = R - C- R

Temporary hardness can be removed by__________.

Choose an answer

Quick lime

Slaked lime

Lime stone

HCl

Chemical formula of chloroform.

Choose an answer

CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Carbon Tetra chloride is used in .

Choose an answer

Fertilizer

Dry cleaning

Metallurgy

Anesthesia

The pH of acid rain.

Choose an answer

2

3

4

5

Which element do not causes toxicity in water?

Choose an answer

Lead

Arsenic

Sodium

Mercury

Lipids are macromolecules made up of.

Choose an answer

Fetty acids

Amino acids

Nucleotides

None of them

In the beginning the rate of reverse reaction is

Choose an answer

Negligible

Moderate

Very fast

Slow

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

Choose an answer

CaCl₂

NaCl

CaO

Na₂SIO₃

Photosynthesis process produces.

Choose an answer

Starch

Cellulose

Sucrose

Glucose

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

Grease stains from clothes are removed by sing.

Choose an answer

Ammonium nitrate

Aluminium hydroxide

Ammonium hydroxide

Aluminum chloride

Which one is homocyclic compound?

Choose an answer

Benzene

Cyclobutane

Cyclohexane

All

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

Choose an answer

free radical

adduct

molecular ion

conjugate

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

Choose an answer

80

90

95

99

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

Which gas like a glass wall of g green house:

Choose an answer

CO

O2

CO2

N2

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

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.

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

Cholera is caused by

Choose an answer

Protozoa

Virus

Bacteria

Fungi

Earth has natural systems.

Choose an answer

One

Two

Three

Four

Which acid is used for etching designs on copper plates?

Choose an answer

H₂SO₄

HNO₃

HCl

CH₃COOH

Vibrious cholera bacteria causes the disease

Choose an answer

Cholera

Diarrhea

Jaundice

Hepatitis

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

Choose an answer

Carbonate salts.

Sulphonic acid salts.

Sulphate salts.

Phosphate salts.

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

Choose an answer

Nitrogen

Hydrogen

Oxygen

Carbon

Which is the substitution reaction in the following?

Choose an answer

Halogenation of alkenes

Halogenation of alkynes

Bromination of alkene

Halogenation of alkanes

Coal tar contains compounds

Choose an answer

Benzene

Phenol

Toluene

All

Water is a;

Choose an answer

strong electrolyte

non-electrolyte

weak electrolyte

natural compound

Indicators are the

Choose an answer

Inorganic compounds

Organic compounds

Ionic compounds

Covalent compounds

Arrhenius put forward acid base concept in.

Choose an answer

1878

1786

1787

1790

Extraction of metals from its ores is called.

Choose an answer

Metallurgy

Mining

Griding

All

Which is the main component of natrual gas.

Choose an answer

Methane

Ethane

Propane

Charcoal

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

Choose an answer

H2SO4

HNO3

CH3COOH

HCI

Which one is triglyceride.

Choose an answer

carbohydrates

Proteins

Lipids

Vitamins

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 gas is used to destroy harmful bacteria in water?

Choose an answer

Iodine

Chlorine

Flourine

Bromine

In laboratory urea was prepared by

Choose an answer

Wohler

Rutherford

Berzelius

Dalton

All water soluble metallic oxides have characteristic of:

Choose an answer

acidic

basic

neutral

amphoteric

The color of Fe(OH)₂ ppt is.

Choose an answer

White

Brown

Muddy green

Blue

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

Choose an answer

Jaundice

Dysentery

Cholera

Typhoid

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

Choose an answer

Two

Three

Four

Five

Temporary hardness in water can he removed by.

Choose an answer

Boiling Method

Using washing soda

Using sodium zeolite

All of them

Which acid is found in Ant sting?

Choose an answer

Citric Acid

Formic Acid

Uric Acid

Sulphuric acid

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

Benzene is formed by the polymerization of.

Choose an answer

Alkene

Alkane

Acetylene

Methane.

Such reactions which continue in both directions are called.

Choose an answer

Irreversible

Reversible

Nonreactive

Dynamic

Deficiency of Vitamin E causes.

Choose an answer

rickets

Scurvy

Anemia in babies

Night blindness.

Ozone id beneficial for us as it:

Choose an answer

absorbs infrared radiations

absorbs ultraviolet radiation

absorbs chlorofluorocarbons

absorbs air pollutants

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

Coal gas is mixture of

Choose an answer

CO and CH₄

CO . CH₄. CO₂

CO, CH₄, H₂

CO, H₂ and CO₂

Brown hair contains.

Choose an answer

Iron compound

Copper compound

titanium compound

Both a and b

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

Choose an answer

N₂

O₂

Cl₂

S

Which protect our muscles from cramping?

Choose an answer

Carbohydrats

Vitamins

Lipids

Proteins

Natural gas contains.

Choose an answer

Methane

Ethane

Propane

All

Which one of the mineral acid.

Choose an answer

HCl

H₂SO₄

HNO₃

All of these

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

Choose an answer

Carbonization

Catenation

Hydrogenation

Cracking

Which one of the following compounds is an aldehyde?

Choose an answer

CH₃-CH₂-OH

CH₃-COOH

CH₃CHO

CH₃COCH₃

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

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

Choose an answer

they all contain carbon

They are renewable

they produce pollutants when burnt

they cause acid rain

Fossil fuel means.

Choose an answer

Coal

Petroleum

Natural gas

All of them

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

Choose an answer

1

2

3

4

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

Choose an answer

Lead metal

Chromium metal

Mercury metal

Aluminium metal

Hook warm larvae enter the body through.

Choose an answer

Food

Water

Skin

All of them

The functional group -COOH is found in.

Choose an answer

Aldehydes

Esters

Carboxylic acids

alcohols

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

Choose an answer

Irreversible reactions

Reversible reactions

Direct reactions

Indirect reactions

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 gas is evolved when acids react with carbonates and bicarbonates?

Choose an answer

Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

Which one of the ore of copper?

Choose an answer

Copper glance

Chalcopyrite

Both a and b

None of these

What one of the following does not contain protein?

Choose an answer

Pulses

Potatoes

Beans

Eggs

The forward reaction takes place:

Choose an answer

Right to left

Left to Right

Only to right

Only to left

Which of the following salt is soluble in water.

Choose an answer

NaCl

KCl

Na₂SO₄

All of them

On which bases froth floatation process take place?

Choose an answer

Density bases

Concentration basis

Watting basis

None of these

Acetic acid is used for:

Choose an answer

Elching designs

Clearing metals

Flavouring food

Making explosives

The percentage of protein in dry weight of cell.

Choose an answer

20%

40%

50%

70%

The number of carbon atoms present in petroleum ether.

Choose an answer

1-5

2-5

3-7

5-7

Normally rain water is weakly acidic because of.

Choose an answer

SO₃ gas.

CO₂gas.

SO₂gas.

NO₂gas.

The freezing point of water is:

Choose an answer

10 ^oC

100^oC

0^oC

46^oC

The body reactions are catalized by.

Choose an answer

Amino acids

Lipids

Enzymes

Fatty acids

Law of Mass Action was put forward by:

Choose an answer

G.N.Lewis

Lowry

Arrhenius

Gulbderg and Waage

Hook worm infects.

Choose an answer

Liver

Small intestine

Large intestine

Stomach

Formula of baking soda is.

Choose an answer

Na₂CO₃

NaHCO₃

Na₂SO₄

Na₂PO₄

Substitution reaction is the characteristics of.

Choose an answer

Alkanes

Alkenes

Alkynes

None of these

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

Choose an answer

Nitration

Fixing

Oxidation

Reduction

Building block of lipids are.

Choose an answer

Fatty acids

Carboxylic acids

Mineral acids

Alcohols

Molecular formula of butyne is .

Choose an answer

C₄H₆

C₃H₄

C₄H₇

C₄H₈

Which one of the not metal.

Choose an answer

Copper

Carbon

chromium

Iron

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

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

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

Choose an answer

Ni

Pt

Pd

Both a and b

Boiling point of water is:

Choose an answer

0^oC

25^oC

80^oC

100^oC

Which disease causes bone and tooth damage?

Choose an answer

Fluorosis

Hepatits

Cholera

Jaundice

Swimming pools are cleaned by a process:

Choose an answer

Hydrogenation

Bromination

Chlorination

Nitration

Functional group of Alcohols is

Choose an answer

-COOH

-C=0

C-O-C

-OH

General formula of Alkynes is.

Choose an answer

C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-2

C_nH_2n-2

Which type of reactions take place in both directions?

Choose an answer

Addition reactions

Reversible reactions

Irreversibel reactions

Decomposition reactions

Iron and steel structure are damaged by.

Choose an answer

Carbon monoxide

Sulphur dioxide

Methane

Carbon dioxide

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

Choose an answer

H₂S

SO₂

O₂

O₃

Plants produces by the photosynthesis process.

Choose an answer

Glucose

Fructose

Sucrose

Maltose

Building are being damaged by acid rain because it attacks.

Choose an answer

Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxalate

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

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

In the bessemerization process.

Choose an answer

Roasted ore is beated.

Molten matte is removed.

Molten matte is heated

Molten matte is added

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

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

Choose an answer

NaOH

KOH

NaCl

None of these

Which are called paraffines?

Choose an answer

Alkyle

Alkynes

Alkenes

Alkanes

A neutral salt is not composed of.

Choose an answer

Metallic ion

Non metallic anion

Anion of base

Anion of acid

Vital force theory was rejected by.

Choose an answer

Jabir Bin Hayan

Drawin

Wohler

Berzellius

The most important oligosaccharide is:

Choose an answer

Sucrose

Glucose

Fractose

Maltose

Bister copper is pure about;

Choose an answer

70%

80%

90%

98%

Temporary hardness is removed by adding.

Choose an answer

Quick lime

Slaked lime

Lime stone

Lime water.

Condensed formula of ethane is

Choose an answer

C₃Cl₈

C₂Cl₆

H₃CCH₃

None of these

Formic acid is present in

Choose an answer

String of bees

Sour milk

Apple

Fats

Which acid used for food preservation?

Choose an answer

H₂SO₄

HNO₃

HCl

CH₃COOH

Methyl orange produces which colour in basic solution

Choose an answer

Red

Yellow

Pink

White

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

Choose an answer

Proton

Electron pair

Neutron

Electron

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.

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 the percentage of carbon in anthracite?

Choose an answer

60%

70%

80%

90%

DNA was discovered by

Choose an answer

J .Watson

Funk

Robert brown

Hopkins

Soda time is a mixture of:

Choose an answer

CaO and NaOH

CaCI2 and NaOH

CaO and ca(OH)2

CaCI2 and KOH

The number of carbon atoms present in diesel oil.

Choose an answer

10-15

11-15

12-15

13-15

Fructose contain group.

Choose an answer

Ketone

Aldehyde

Alcoholic

Alkyl

Which of the following can be used as a fuel?

Choose an answer

Methanol

Ethanol

Bio-diesel

All of them

Hard water can cause.

Choose an answer

Stomach disorder

Boiler blasts

Inefficiency of engine

All of them

Which of the following is a secondary pollutant.

Choose an answer

CO₂

CO

SO₃

HF

Which of the followings is a disaccharide?

Choose an answer

Glucose

Fructose

Sucrose

Starch

The process which convert vegetable oil into banaspati ghee called.

Choose an answer

Hydrogenation

Halogenation

a and b

None of these

Example of pest is

Choose an answer

Weeds

Herbs

Insect

All of them

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

Choose an answer

Sulphur

Carbon

Nitrogen

All of them

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

The example of heterocyclic compound is.

Choose an answer

Benzene

Hexane

Cyclohexane

Pyridine

Inland water includes.

Choose an answer

River

Lakes

Streams

All 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

Alkanes are produced in large amounts by cracking of

Choose an answer

Natural gas

Petroleum

Benzene

Xylol

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

Building and Monuments lose their beauty and shine due to

Choose an answer

U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

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

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

When NaHCO₃is heated if forms:

Choose an answer

CO₂

Ca(OH)₂

CaCO₃

CaO

Which one is heterocyclic compound?

Choose an answer

Benzene

Cyclobutane

Thiophene

Nephthalene

Main component of natural gas is

Choose an answer

Methane

Propane

Butane

Propene

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 factor determines the severity of a pollutant?

Choose an answer

Chemical nature

concentration

Persistence

All of them

The unit of molar concentration is:

Choose an answer

moldm^-3

moldm⁺³

molcm^-3

molcm⁺³

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

Choose an answer

Salt

Water

Adduct

None of these

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

Which of the following gas is used in warfare?

Choose an answer

Methane

Ethane gas

Mustard gas

None of these

Formula of acetaldehyde is:

Choose an answer

Which is used to manufacture of soap?

Choose an answer

NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Low sugar level in human body result in.

Choose an answer

Hyperglycemia

Hypoglycemia

Anemia

All of them

Number of vitamins in vitamin B complex is.

Choose an answer

10

8

6

12

Nucleic acids made up of long chain of.

Choose an answer

Nucleotide

Fatty acids

Amino acid

None of them

Oxidation of alkenes forms:

Choose an answer

Glycol

Glyoxal

Formic acid

Oxalic acid

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

Choose an answer

Carbonization

Destructive distillation

Fractional distillation

All

Which of following is not conjugate base.

Choose an answer

S^-2

F^-1

Na⁺

SO₄

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

Choose an answer

Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxilat

Which vitamin is soluble in water?

Choose an answer

Vitamin A

Vitamin E

Vitamin D

Vitamin C

The energy provided by carbohydrates in per gram.

Choose an answer

17 KJ

21 KJ

35 KJ

10 KJ

Coal having 90% carbon contents is called.

Choose an answer

Peat

Lignite

anthracite

bituminous

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

Choose an answer

Soluble in water

Naturally occuring.

Carbohydrates

Disaccharides

Formula of Methyl alcohol

Choose an answer

CH₅-OH

CH₃-CH₂-OH

All of them

None of these

Carbon black is used in the manufacture of.

Choose an answer

Dry cleaning

Shoe polishes.

Fertilizer

None of these

What percentage of nitrogen and oxygen is in the atmosphere.

Choose an answer

69%

79%

9%

89%

Ozone is formed in:

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

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

Choose an answer

26%

32%

50%

18%

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

Choose an answer

Ketone

Ether

Aldehyde

Ester

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

Choose an answer

Reversible reaction

Irreversible reaction

Decomposition

Addition

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

Choose an answer

Vitamin D

Vitamin E

Vitamin B

Vitamin A

Which is a hereditary material?

Choose an answer

DNA

RNA

Protein

All of them

Which one of the following is polmerized to from benzene?

Choose an answer

ethane

ethene

methane

ethyne

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.

____________ use for ripening of fruits.

Choose an answer

Ethene

Ethane

Ethyne

Propane

Which of one the following is Lewis base?

Choose an answer

BF3

H+

NH3

Ag+

Which one of these protects us against the disease;

Choose an answer

Carbohydrates

Lipids

Proteins

all of these

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

Choose an answer

Roasting

Smelting

Bessemerization

All

pH value normally varies from.

Choose an answer

0-14

1-14

7-14

10-14

Salt makes the water permanently hard.

Choose an answer

CaSO₄

Ca(HCO₃)₂

NaHCO₃

NaCO₃

The pH of water containing CO₂ is

Choose an answer

4-6

5.6-6

6-7

7-8

Red hair contains compound of.

Choose an answer

Iron

copper

titanium

Molybdenum

Which one of the following is not an air pollutants?

Choose an answer

Nitrogen

Carbon dioxide

Nitrogen oxide

Ozone

Which acid is present in our stomach.

Choose an answer

Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

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

Acidic solutions have pH value.

Choose an answer

Less than 7

Greater than 7

equal to 7

None of these

Which compound protect teeth from diseases?

Choose an answer

Fluorine compound

Chlorine compound

Iodine compound

Bromine compound

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

Choose an answer

Iodine

Chlorine

Fluorine

Bromine

Which is used to remove the grease stains from clothes?

Choose an answer

NaOH

KOH

Al(OH)₃

NH₄OH

Our planet earth consists of ____________ natural Spheres.

Choose an answer

1

4

6

8

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

Choose an answer

Gangue

Silicates

Aluminates

All

Alkanes are least reactive compounds because they are.

Choose an answer

Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

Tetra saccharides are classified under.

Choose an answer

Monosaccharides.

Oligosaccharides

Polysaccharides

All of them

Froth flotation process is used to concentrate.

Choose an answer

Copper ore

Iron ore

Chromium ore

Aluminum ore

Imperial chemical industries was established in.

Choose an answer

1942

1944

1950

1990

The colour of litmus paper in strong acidic solution.

Choose an answer

Red

Blue

Yellow

Colourless

Which one of the following is testeless?

Choose an answer

Sucrose

Glucose

Fructose

Starch

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

The reaction will attain the equilibrium if:

Choose an answer

Qc<Kc

Qc > Kc

Qc = Kc

Qc = 0

_________ acid is used in lead storage batteries as electrolyte.

Choose an answer

CH₃COOH

HCl

HNO₃

H₂SO₄

Water of crystallization is responsible for.

Choose an answer

Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

The dynamic equilibrium in irreversible reaction.

Choose an answer

Never establishes

Establishes after completion of reaction

Establishes before completion of reaction

Establishes very soon

The formula of ozone is.

Choose an answer

O₂

O₃

O

CO

Forest fires and burning of wood emit.

Choose an answer

CO₂

NO₂

SO₂

Cl₂

Potassium ferrocyanide salt is.

Choose an answer

Normal

complex

Basic

Acidic

Acid means

Choose an answer

Sour

Bitter

Sweet

Salty

Percentage of methane present in natural gas is.

Choose an answer

75%

80%

85%

90%

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

Jabir Bin Haiyan prepared.

Choose an answer

Nitric Acid

Hydrochloric acid

Sulphueric Acid

All of these

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

Choose an answer

Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Which one of the following is Lewis base?

Choose an answer

NH₃

BF₃

H⁺

AlCl₃

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

Choose an answer

caustic soda

washing soda

urea

sulphuric acid

The value of K_c depends on.

Choose an answer

Temperature

Pressure

Volume

Atmosphere

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

Choose an answer

Chlorine gas

Neon gas

Helium gas

Ozone gas.

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

Choose an answer

Lavoisier

Humphrey Davy

Dalton

Arrhenius

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

Choose an answer

Metallurgy

Non metal

Metalloid

Alloy

A conjugate base is a specie formed by donating a.

Choose an answer

Proton

Electron pair

Neutron

Electron

The bond in the product of lewis acid base reaction.

Choose an answer

Ionic

Covalent

Metallic

Coordinate covalent

A strange bitter smell noticed near photocopiers is of:

Choose an answer

SO2

H2S

O2

O3

Ionic compounds are soluble in water due to:

Choose an answer

Hydrogen bonding

ion-dipole forces

Dipole-dipole forces

Dipole -induced dipole forces

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

Choose an answer

NaCl

Na₂CO₃

Na₂SiO₃

NaCl

Which pollutant is not found in car exhaust gases?

Choose an answer

CO

O₃

NO₂

SO₃

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

Pentahydroxy ketone is called as:

Choose an answer

Glucose

Fructose

Starch

Sucross

Major portion of ozone layer is foun in.

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

Which diseases cause by the deficiency of vitamin E?

Choose an answer

Rickets

Anemia in babies

Scurvy

Night blindness

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

Choose an answer

CO₂

CO

N₂

O₃

Which one is not an Arrhenius base?

Choose an answer

NaOH

KOH

Ca(OH)₂

NH₃

Glucose is:

Choose an answer

Hexabydroxy aldehyde

Hexahydroxy ketone

Polyhydroxy aldehyde

Pentahydroxy ketone.

How many percent of natural gas is consisted of methane.

Choose an answer

60%

70%

80%

85%

99% of atmosphere consists of .

Choose an answer

N₂and H₂

N₂and O₂

N₂and CO₂

O₂and CO₂

When bones are heated they give.

Choose an answer

Starch

Gelatin

Fats

Oils

Protein is not found in:

Choose an answer

Muscles

Skin

Cotton

Hair

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

Choose an answer

Ethyl alcohol

ethylene oxide

ethylene glycol

diethyl ether

Chemical formula of Stearic acid.

Choose an answer

C₁₅H₃₁COOH

C₁₇H₃₅COOH

C₁₅H₃₇COOH

None of them

The percentage of potable water on earth is.

Choose an answer

2%

0.2%

0.02%

0.002%

Which acid is found in sour milk?

Choose an answer

`Formic acid

Lacitc acid

Citric acid

Butric acid

Chemical formula of copper glance is:

Choose an answer

Cu2O

Cu2S

CuFeS2

CuSO4

Acute lead poisoning causes dysfunction of.

Choose an answer

Kidney

Liver

CNS

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 major effect of global warming?

Choose an answer

Increase in temperature.

Rise in sea level

Melting of glaciers

All of them

Chemical form of gypsum.

Choose an answer

MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

The source of galactose.

Choose an answer

Fruits

Vegetables

Cereals

All of them

The layer above troposphere extend upto 50 kilometers called.

Choose an answer

Mesosphere

Hydrosphere

Stratosphere

Thermosphere

Traces of acetylene are present to coal gas about.

Choose an answer

0.06 %

0.08%

1.1 %

90%

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

Choose an answer

C₂H₄

C₃H₈

C₇H₁₀

C₁₂H₂₆

Which help to keep the bowel functioning property

Choose an answer

Dietary fiber

Vitamins

Lipids

Carbohydrates

Cause of global warming is :

Choose an answer

CO₂ gas

SO₂gas

NO₂gas

O₂gas

Concentration of the copper ore is carried out by:

Choose an answer

Calcinations

Roasting

Forth flotation

Distillation

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

The reduction of alkyl halides takes place in the presence of

Choose an answer

Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

Petroleum fraction having composition C₇to C₁₀IS called

Choose an answer

Petroleum gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

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

Choose an answer

Lead

Chromium

Aluminium

Mercury

Traces of acetylene are present in coal gas about.

Choose an answer

0.06 %

0.08%

1.1%

90%

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

Choose an answer

Salts

Algae

Fishes

All of them

Cause of global warming is:

Choose an answer

CO₂gas

SO₂gas

NO₂gas

O₂gas

The order of reactivity of hydrogen halides with alkenes is.

Choose an answer

HI>HBr

HBr>HI

HCl>HBr

HBr < HCl

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

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

General formula of carbohydrates is.

Choose an answer

C_n(H₂O)₆

C_n(H₂O₂)₆

C_n(H₃O)₆

C_n(H₂O₃)₆

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

Choose an answer

equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

Silicon occurs in the form of

Choose an answer

Silica

Silicates

both a and b

None of these

Chloroform is used for

Choose an answer

Anesthesia

Fever

Link

Toys

Pitch is black residue of

Choose an answer

Coke

Coal-tar

Coal

Coal gas

The residual oil is heated above 400 c to produce.

Choose an answer

Lubricants

Paraffin wax

Asphalt

All

Alkynes are also called.

Choose an answer

Olefine

Ethene

Paraffins

Acetylenes

Which disease cause when humans use water of industrial effuents.

Choose an answer

Cancer

Asthma

Jaundica

Cholera

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

Choose an answer

Typhoid

Jaundice

Cholera

Dysentery

Which element protects teeth from decay?

Choose an answer

Potassium

Fluorine

Sodium

Calcium

Which gas is in involved in ozone depletion?

Choose an answer

Nitrogen

CFC's

Chlorine

All of them

Raw materials used in Solvay's process.

Choose an answer

Brine

Lime stone

Ammonia gas

All

Ammonia is prepared by:

Choose an answer

Solvay's process

Haber's process

Floatation process

Bayer's process

Temporary hardness is because of.

Choose an answer

Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Triglycerides are fatty acids.

Choose an answer

Unsaturated

Saturated

Both of them

None of them

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

Choose an answer

Fructose

Starch

Cellulose

None of them

Oxidation of alkenes produce.

Choose an answer

Glyoxal

Glycol

Oxalic acid

Formic acid

Which of the following is a poisonous gas.

Choose an answer

Oxygen

Ozone

Nitrogen

Carbon dioxide

Potassium Ferrocyanide is a:

Choose an answer

Normal salt

Mixed salt

Complex salt

Double salt

Olefins is a Latin word meaning:

Choose an answer

inert

less reactive

oil forming

most reactive

Which one is used for alkaline batteries?

Choose an answer

NaOH

Ca(OH)₂

KOH

Mg(OH)₂

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

Choose an answer

Condensatin

Transpiration

Capillary action

Evaporation

Sodium zeolite is resin of:

Choose an answer

NaAl(SiO₃)₂

KAl(SiO₃)₂

LiAl(SiO₃)₂

RbAl(SiO₃)₂

Which base is more corrosive?

Choose an answer

NH₄OH

NaOH

Ca(OH)₂

AL(OH)₂

Which one of the following is a synthetic fibre?

Choose an answer

Cotton

Wool

nylon

silk

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

Choose an answer

Completion

Equilibrium state

back ward

None of these

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.

Reaction which have comparable amount 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

Urea is nitrogenous fertilizer. It consist of nitrogen.

Choose an answer

26.6 %

36.6%

46.6%

56.6%

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

Which one of the following is not a fossil fuel?

Choose an answer

Coal

Natural gas

Bio gas

Petroleum

The region in which ozone layere depletes is called.

Choose an answer

Ozone hole

Black hole

Both of them

None of them

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

Choose an answer

40%

60%

70%

80%

Citric acid is present in

Choose an answer

Citrus fruits

Sour milk

Rancid butter

Apple

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

Choose an answer

Primary pollutant

Secondary pollutant

Tertiary pollutant.

None of them

How many percentage to water contains oceans?

Choose an answer

67%

77%

87%

97%

White viscous fluid present in an egg is.

Choose an answer

Proten

Fats

Vitamin

Carbohydrates.

The base which is used in alkaline batteries is.

Choose an answer

NaOH

Al(OH)₂

KOH

Mg(OH)₂

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

Choose an answer

Jaundic

Dysentery

Cholera

Typhoid

In solvay's process slaked lime is used to:

Choose an answer

Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

Which compound do not produce in the halogenation of methane.

Choose an answer

Chloroform

Carbon tetrachloride

Carbon black

Chloromethane

Which of the following is reducing sugar.

Choose an answer

Glucose

Fructose

Sucrose

Starch

Molecular formula of butane is

Choose an answer

C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

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

Choose an answer

Proteins

Vitamins

Carbohydrats

Lipids

Molecular formula of stearic acid is.

Choose an answer

C₁₅H₃₁ COOH

C₁₂H₁₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

How many % age of urea is used as fertilizers?

Choose an answer

80%

90%

95%

98%

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.

The % age of carbon is lignite is

Choose an answer

60

70

80

90

Which acid is used for food preservation?

Choose an answer

Hydrochloric acid

Benzoic acid

Sulphuric acid

Nitric acid.

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

Choose an answer

glucose

fructose

starch

sucrose

On which base atmosphere is divided into four regions?

Choose an answer

Change in pressure

Change in rediation

Change in temperature

Change in volume

pH of neutral solution is always.

Choose an answer

6

5

7

10

Alkenes are produced in large amounts by cracking of.

Choose an answer

Natural gas

Petroleum

Benzene

xylol

Infrared radiation emitted by the earth are absorbed by?

Choose an answer

CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

Freezing point of water is:

Choose an answer

-4°C

0°C

-36°C

-58°C

The % age of drinkable water on earth is

Choose an answer

2.0%

0.02%

0.2%

5.0%

Formula of Decane is.

Choose an answer

C₁₀H₂₀

C₁₀H₂₂

C₁₀ H₄

C₁₀H₁₆

Which is not a heavy metal.

Choose an answer

Cadmium

Lead

Zinc

Murcury

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

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

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

Choose an answer

Two

Three

Four

Six

If Qc > Kc the reaction will be in

Choose an answer

Chemical equilibrium

Static equilibrium

Reverse reaction

Forward reaction

Which one the following is more reactive?

Choose an answer

Methane

Ethane

Ethene

Acetylene

Some orchids attracts bees for pollination by producing.

Choose an answer

alkanes

almenes

alkynes

all the above.

When HCl and KOH is reacted the salt formed is.

Choose an answer

Acidic

Basic

Normal

Complex

Lavoisier named binary compounds of oxygen acids in .

Choose an answer

1787

1790

1815

1828

Formula of Urea is.

Choose an answer

KCNO

H₂N-CO-NH₂

HN-CO₂-NH

H₃N-CO-NH₃

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

Choose an answer

Carbon tetrachloride

Chloroform

Chloromethane

No reaction

Essential components of every living all are.

Choose an answer

Nucleic acids

Enzymes

Lipids

Cell wall

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

The heat capacity of water is greater than rocks.

Choose an answer

4 times

5 times

6 times

7 times

Oxidation of ethene with KMnO₄produces.

Choose an answer

oxalic acid

glyoxal

ethene glycol

Propene glycol

How many % age of nitrogen in urea fertilizers?

Choose an answer

40.6

45.6

46.6

50

The order or reactivity of hydrogen halides with alkenes is.

Choose an answer

HI/Br

HBr > HI

HCl > HBr

HBr>HCl

Calcium carbonate is in water.

Choose an answer

Insoluble

Sparingly

None of them

Soluble

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

Choose an answer

70%

75%

78%

80%

Infrared radiations emitted by the Earth are absorbed by.

Choose an answer

CO₂ and H₂O

N₂ and O₂

CO₂and N₂

O₂and CO₂

The earth atmosphere is getting hotter because of :

Choose an answer

SO₂

O₃

CO₂

CO

Blonde hair contains compound of.

Choose an answer

Iron

Copper

titanium

Molybdenum

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

Choose an answer

Fractional distillation

sublimation

Roasting

Destructive distillation

Which is simplest alkane?

Choose an answer

CH₄

C₂H₈

C₂H₂

C₂H₄

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.

Cause of Night blindness is.

Choose an answer

Deficiency of vitamin B

Deficiency of vitamin A

Deficiency of vitamin D

Deficiency of vitamin E

A saturated solution of sodium chloride is called.

Choose an answer

Brine

Suspension

Colloidal

None of these

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

Smell of rancid butter is due to the presence of.

Choose an answer

Propanoic acid

Butanoic acid

Acitic acid

Citric acid

Word "acid" derived from:

Choose an answer

Urdu

English

Latin

Greek

Which one of the following is not air pollutant.

Choose an answer

CO₂

CO

NO₂

O₂

The two major components of atmosphere are:

Choose an answer

Hydrogen and oxygen

Nitrogen and Hydrogen

Nitrogen and oxygen

Oxygen and water.

Guldberg and waage out forward law of mass action in:

Choose an answer

1889

1879

1869

1859

When Bronsted and Lowry put forward acid base concept?

Choose an answer

1913

1923

1933

1943

Permanent hardness can be removed by using .

Choose an answer

Soda lime

Sodium Zeolite

Quick lime

Lime water

Which gas creates suffocation and causes death?

Choose an answer

CO

CO₂

SO₃

SO₂

Which types of reaction speed up gradually?

Choose an answer

Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

Which acid is used for etching glass?

Choose an answer

HF

HCl

HBr

HI

When the reaction causes to produced it is called.

Choose an answer

Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

Bronsted and Lowry presented their theories of acids and bases in

Choose an answer

1785

1787

1923

1925

Which salt is used as a table salt?

Choose an answer

NaCl

Na₂CO₃

Na₂SiO₃

NaCl

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 gas is responsible in warming the atmosphere?

Choose an answer

Nitrogen

Hydrogen

Helium

Fluorine

Which chemical is called king of chemicals?

Choose an answer

KNO₃

H₂SO₄

HCl

NHO₃

The chemical used in Clark's method is:

Choose an answer

CaO

slaked lime(Ca(OH)s)

washing soda

sodium zeolite

Crude oil is heated to the fractionating furnace upto.

Choose an answer

300 ^oC

350^oC

400^oC

450^oC

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

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

Choose an answer

Kerosene oil

Diesel oil

Alcohol

Petrol

Sodium carbonate is manufactured by.

Choose an answer

Haber's process

Ostwald's process

Solvay's process

All

Atmosphere has regions.

Choose an answer

One

Two

Three

Four

Oxidation of Ethene with KMnO₄ produces.

Choose an answer

Oxalic acid

Glyoxal

Ethene Glycol

Propene glycol

All bases turn red litmus

Choose an answer

Red

Blue

Pink

White

The major components of Atmosphere are:

Choose an answer

Carbon and Nitrogen

Nitrogen and Oxygen

Oxygen and Chlorine

None of these

If Qc < Kc the reaction goes in:

Choose an answer

Forward

Reverse

At equilibrium state

None

Carbon content in coke is.

Choose an answer

80%

98%

70%

88%

Rickets disease is caused by the deficiency of.

Choose an answer

Vitamin D

Vitamin A

Vitamin E

Vitamin C

Normal rain water is:

Choose an answer

weakly acidic

strongly acidic

weakly basic

strongly basic

Chalco-pyite is an ore of:

Choose an answer

iron

aluminium

silver

copper

Ultraviolet radiations can causes.

Choose an answer

Hepatitis

Asthma

Skin cancer

Night blindness

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

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

Mesophere extend forms 50 km to:

Choose an answer

50 km

12 km

60 km

85 km

Mercury poisoning cause:

Choose an answer

neurological damage

high blood pressure

kidney damage

gastro

Which salt cause permanent hardness in water is:

Choose an answer

Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

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.

Which one Ion is not present in salt.

Choose an answer

Metallic cation

Anion of Base

Anion of acid

None metallic anion

Petroleum is refined by

Choose an answer

Destructive distillation

Fractional distillation

Simple distillations

Dry distillation

Which of the following in soluble in water.

Choose an answer

Organic acids

Glucose

Alcohal

All of them

What is pOH of 0.01 M solution of HCl?

Choose an answer

1

4

12

13

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

Choose an answer

H2

CO₂

Cl₂

N₂

Chemical formula for urea is:

Choose an answer

NH4CNO

NH4CH

NH2CONH2

NH4CI

Ozone depletion was first noticed is.

Choose an answer

1970's

1980's

1990's

1960's

A conjugate acid is a specie formed by accepting a.

Choose an answer

Proton

Electron pair

Neutron

Electron

Which of the following is tasteless?

Choose an answer

Starch

glucose

Fructose

Sucrose

Neurological damage is caused by the poisoning of.

Choose an answer

Lead

Cadimium

Mercury

All of them

Example of complex salt is.

Choose an answer

Zinc sulphate

Potash alum

Potassium ferrocynide

Sodium Phosphate

The process of removing temporary hardness of water.

Choose an answer

Clark's method

Washing soda method

Sodium zeolite

Filteration method

Mallic acid is present in

Choose an answer

Apple

Feats

String of bees

Urine

At which temperature o water shows mxamimum density.

Choose an answer

0 ^oC

100^oC

4^oC

-4^oC

Lactose and maltose are;

Choose an answer

monosaccharides

disaccharides

trisaccharides

tetrasaccharides

Which one of the following is not air pollutants?

Choose an answer

N₂

CO

NO₂

O₂

Guldberg and waage put forward law of mass action in:

Choose an answer

1860

1869

1870

1879

Which one of the following is a fat soluble vitamin?

Choose an answer

A

E

K

All of these

Formula of soda ash is.

Choose an answer

Na₂CO₃

NaHCO₃

Na₂SO₄

Na₃PO₄

The percentage by volume of nitrogen in dry gas is.

Choose an answer

78.09%

20.94%

0.93%

0.03%

Mesosphere has a temperature range.

Choose an answer

17 ^oC - 58^oC

58^oC - 2^oC

2^oC - 93^oC

- 93^oC

What is the colour of hydrogen iodide in product?

Choose an answer

Purple

Yellow

Blue

Colorless

The % age of carbon in coke is

Choose an answer

60

70

90

98

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

Choose an answer

Carbon black

Ethane

Propane

Both b and c

Which one of the following diseases causes liver inflammation?

Choose an answer

Typhoid

Jaundice

Cholera

Hapatitis

The end product of oxidation of acetylene is.

Choose an answer

Propen glycol

Ethan glycol

Glyoxal

Oxalic acid

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

Choose an answer

CO₂

CO

N₂

O₃

Natural source of citric acid is:

Choose an answer

Rancid butter

Fats

Lemon

Sour milk

75% atmosphere mass lies in how many kilometers.

Choose an answer

11 km

30 km

50 km

85 km

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

Choose an answer

Dalton

Thomson

Haber

Waage

The % age of carbon is bituminous is

Choose an answer

60

70

80

90

Sum of PH and POH of a solution is:

Choose an answer

7

14

16

18

A sea level the boiling point of water is.

Choose an answer

0^oC

98^oC

100^oC

110^oC

Petroleum is refined by:

Choose an answer

destructive distillation

fractional distillation

simple distillation

dry distillation

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

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

Condensed formula of ethane is.

Choose an answer

C₃H₈

C₂H_2n+2

C₂H_2n-2

C_nH_2n+1

Composition of carbon in the diesel oil.

Choose an answer

C₇-C₁₀

C₁₀-C₁₂

C₁₃-C₁₅

C₁₅-C₁₈

Chemical formula of amino group is

Choose an answer

NH₃

NH₂

NH₄

COOH

Which gas is also known as life gas for plants.

Choose an answer

CO

CO₂

O₂

NO₂

The percentage of water in human body is about:

Choose an answer

60%

50%

70%

80%

Temporary hardness is because of .

Choose an answer

Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Which disease cause by deficiency of vitamin D?

Choose an answer

Rickets

Anemia in babies

Scurvy

Night blindness

Dehydration of alcohols can be carried out with.

Choose an answer

NaOH

KOH

H₂SO₄

HCl

Swimming pools are cleaned by the process.

Choose an answer

Chlorination

Hydrogenations

Saponification

None of them

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

Choose an answer

Iodine

Chlorine

fluorine

Bromine

Which is not a reducing sugar?

Choose an answer

Glucose

Fructorse

Cellulose

All of them

Which one is not the fraction of residual oil?

Choose an answer

Paraffin wax

Asphalt

Fuel oil

Coke

Alkalis react with ammonium salt to liberate.

Choose an answer

SO₂

CO₂

NH₃

H₂

Monosaccharides are crystalline solids

Choose an answer

Grey

Crimson

Silver

White

Sindh alkalies limited was established near Karachi in.

Choose an answer

1965

1966

1970

2000

Which one of the followoing is the Hardest coal.

Choose an answer

Peat

Lignite

Bituminous

Anthracite

Alkanes do not react in

Choose an answer

Diffused sunlight

Dark

Bright sunlight

None of these

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

Choose an answer

Joundice

Cholera

Dysentery

Typhoid

Which acid is used an electrolyte in lead storage battery?

Choose an answer

H₂SO₄

HNO₃

HCl

CH₃COOH

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.

A bound formed between two amino acids is:

Choose an answer

Peptide linkage

Covalent bound

Hydrogen bound

Glycosidic linkage

Alkanes are also called:

Choose an answer

olefins

Paraffins

aliphatic compound

cyclic compounds

Night blindness is because of deficiency of:

Choose an answer

Vitamin A

Protein

Vitamin C

Vitamin D

Proteins are polymers of.

Choose an answer

Polysaccharide

Oligosaccharids

Amino acid

Nucleic acid

Incinerator reduces solid waste into .

Choose an answer

Ash

Flue gas

Heat

All of them

Glucose and fructose are;

Choose an answer

trioses

tetroses

pentoses

hexoses

^{RNA consists of}

Choose an answer

Ribos

Pentose

Hexose

Trioses

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

Choose an answer

Salt

Water

Hydrogen

Carbon dioxide

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

Choose an answer

Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

Carbonization process is the conversion of

Choose an answer

Coal into coal gas

Coal into wood

Wood into coal

Wood into coal tar

Almost all air crafts fly in which reion?

Choose an answer

Troposphere

Stratosphere

Mesosphere

Thermosphere

Which one contains double covalent bound?

Choose an answer

Pentane

Ethylene

Acetylene

All

Methyl butanoate smell like.

Choose an answer

Apple

Mange

Lemon

Grapes

Who put forward the vital force theory?

Choose an answer

Berzelius

Wohler

Dalton

Lavoisier

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

Choose an answer

Paraffin wax

Asphalt

Fuel oil

Petroleum coke

Maltose is commonly found in .

Choose an answer

Cereal

Milk

Cotton

Honey

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

Choose an answer

concentration

purification process

metallurgy

refining

Which is a Lewis base?

Choose an answer

H⁺

NH₄

BF₃

AlCl₃

Bond energy of C-C is.

Choose an answer

200 KJmol^-1

452 KJmol^-1

300 KJmol^-1

355 KJmol^-1

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

Choose an answer

Proton

Electron pair

Neutron

Electron

Water dissolves Non-ionic compounds by:

Choose an answer

Ion-Ion forces

Dipole forces

Dipole - Dipole forces

Hydrogen Bonding

Hypoglycemia result due to:

Choose an answer

high cholesterol level

low cholesterol level

low sugar level in body

high sugar level in body

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.

Which of the following is reducing sugar?

Choose an answer

Glucose

Maltose

Sucrose

Starch

The order of reactivity of hydrogen halides with alkenes is:

Choose an answer

HI>HBR

HBr>HI

HCl>HBr

HBr>HCl

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

Choose an answer

Precipitates

Residue

Crystals

All of them

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

Choose an answer

NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

A group of gases that maintains temperature of atmosphere is.

Choose an answer

Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

Which gas is not present in atmosphere?

Choose an answer

Nitrogen

Oxygen

Helium

Carbon dioxide

The most important disaccharide is .

Choose an answer

Sucrose

Glucose

Cellulose

None of them

Which one of these is a saturated hydrocarbon?

Choose an answer

C₂H₄

C₃H₆

C₄H₈

C₅H₁₂

Which one of the following species is not amphoteric?

Choose an answer

H₂O

NH₃

HCO₃

SO₄

Which pollutant is responsible for changing weather?

Choose an answer

Air pollutant

Water pollutant

Soil pollutant

All of them

Enzymes are chemically;

Choose an answer

lipids

carbohydrates

proteins

vitamins

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

Choose an answer

Sodium metal

Zinc metal

Magnesium metal

Potassium metal

Synthesis of protein is directed by.

Choose an answer

DNA

RNA

Both of them

None of them

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

Choose an answer

Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

The percentage of sun light absorbed by atmospheric gases is.

Choose an answer

2%

10%

18%

25%

Denaturing of protein is caused by.

Choose an answer

Heating

Changing pH

Both of them

None of these

The boiling point of water is.

Choose an answer

100^oC

4^oC

0^oC

25^oC

Incomplete combustion of alkanes produces.

Choose an answer

Carbon dioxide only

Carbon monoxide only

Carbon monoxide and carbon black

Carbon dioxide and carbon black

Catalyst used in Haber's process is:

Choose an answer

Ni

Fe

Cu

Zn

Temporary hardness is due to the presence of bicarbonates of.

Choose an answer

Calcium

Magnsium

Both of them

None of them

Percentage of nitrogen in atmosphere is:

Choose an answer

20.94%

78.09%

0.93%

0.03%

The gas used by animals to perform respiration.

Choose an answer

O₂

N₂

SO₂

Cl₂

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

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

How trace amount of acetylene present in the coat gas.

Choose an answer

0.06%

0.07%

0.08%

0.09%

The meaning of latin word acidus is.

Choose an answer

Sweet

Tasteless

Salty

Sour

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

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

Choose an answer

Inversible reactions

Reversible reaction

Decomposition

Addition

When glucose and fructose combine they produce

Choose an answer

Starch

Cellulose

Sucrose

None of these

Which one of the following cannot by hydrolyzed?

Choose an answer

Polysacchrides

Monosacchrides

Oligosacchrides

All of these

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

Which gas is produce by the electrical lightening of air.

Choose an answer

NO

SO₂

SO₃

CO₂

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

Choose an answer

CO₂ and water.

Sunlight

O₂

Chlorophyll

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

Choose an answer

CH = CH

CH₃ - CH₃

CH₃CH₂CH₃

CH₂= CH₃

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

An equilibrium is achievable only in a:

Choose an answer

big system

small system

open system

closed system

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

When NaHCO₃ is heated it forms.

Choose an answer

CO₂

Ca(OH)₂

CaCO₃

CaO

Acids turn

Choose an answer

Blue litmus red

Red litmus blue

Blue litmus green

Blue litmus blue

The alkanes consisting of C₅ to C₁₀

Choose an answer

gases

liquids

solid

plasma

Equilibrium constant value "K" is equal to:

Choose an answer

Kt / Kr

Ki / Kr

Kc / Qc

Qc /Kc

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

Choose an answer

O₂

CO₂

H₂

NH3

How many percentage blister copper is pure?

Choose an answer

95%

75%

98%

100%

Which organ cause to function during Jaundice?

Choose an answer

Liver

Kindney

Stomach

Large intestine.

The ability of carbon atom to form chain is called.

Choose an answer

Isomerism

Catenation

resonance

Condensation

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.

Who was prepared acetic acid in laboratory?

Choose an answer

Berzelius

Wohler

Kolbe

Dalton

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

Choose an answer

vitamins

lipids

proteins

Nucleic acids

Temporary hardness of water is removed by adding.

Choose an answer

Ca(OH)₂

NaOH

KOH

CaSO₄

Arrhenius presented his concept about acids and bases in.

Choose an answer

1785

1787

1923

1930

Monosaccharide consists of number of carbon atoms.

Choose an answer

2 to 4

4 to 8

3 to 9

5 to 10

Which one is the formula of chloromethane.

Choose an answer

CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

Which is disaccharide?

Choose an answer

Glucose

Fructose

Sucrose

Starch

Which one of these is used as anaesthesia?

Choose an answer

carbon black

Mehtane

Ethane

Chloroform

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

Choose an answer

Hydrogenation

Chlorination

Cantenation

Halogenation

___________ is not green house effect.

Choose an answer

Increase of food chain

increase atmospheric pressure

Increase of sea level

Increase of flood risks

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

Choose an answer

NaCl

Na₂CO₃

NaHCO₃

Na₂SiO₃

Which contains sufficient amount of metal?

Choose an answer

Mineral

Ores

Rocks

Soil

Molarity of pure water is

Choose an answer

1

18

55.5

6

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

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

A substance which rerareds the rate of a reaction is called

Choose an answer

Inhibitor

Activator

Auto-catalyst

None of these

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

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

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

Choose an answer

3.0

2.7

2.0

1.5

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

One of the following substances does not undergo sublimation

Choose an answer

KMnO₄

Naphthalene

NH₄CI

Iodine

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

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

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

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

Choose an answer

Heat energy

Magnetic energy

Sound energy

Electric energy

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

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

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

The pH of human blood is

Choose an answer

7.0

7.4

4.0

6.5

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

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 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

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

Tin has Isotopes

Choose an answer

7

9

11

5

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

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

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

Choose an answer

He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

Depression in the F.P is directly proportional to

Choose an answer

Molarity of solution

Molarity of solvent

Molality of solvent

Molality of solution

The distillation of a solution under reduced pressure is called

Choose an answer

Fractional distillation

Destructive distillation

Distillation

Vacuum distillation

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

Which one of the following substances is not amorphous

Choose an answer

Polymer

Rubber

Glass

AgNO₃

The nature of bond in diamond is

Choose an answer

Electrovalent

Metallic

Coordinate covalent

Covalent

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

At equilibrium stage of chemical reaction

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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

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

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State function

Degree and joule

Degree and ergs

Calorie and joule

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

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

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

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8

12

6

4

During the process of crystallization, the hot saturated solution;

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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

Gas equation is derived by combining

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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

The shielding effect of the inner electrons is responsible for

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Increasing ionization energy values

Decreasing ionization energy values

Increasing electron affinity

Increasing electonegativity

Oxidation number of carbon in NaHCO₃

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+4

-6

+6

+2

The liquid pair which is not completely miscible is

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CH₃OH and water

Alcohol and water

Phenol and water

Benzene and toluene

Orbitals having same energy are called

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Hybird orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

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

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O₂⁺²

N₂^-2

B₂

F₂

The electrode reaction of a voltaic cell can be reversed when

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Concentrations of solutions are changed

Temperature is increased

Electrodes are interchanged

Electric circuit is employed to supply the source of electricity

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

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

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

Calorie is equivalent to

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0.4184 J

41.84 J

4.184 J

418.4 J

Which of the following is true for ionic compounds

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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

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Two

Three

Four

Five

The octet rule in not followed in the formation of

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NF₃

CF₄

CCI₄

PCI₅

Isotopes differ in

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Properties which depend upon mass

Arrangement of electrons in orbital

Chemical properties which depend upon weight

Atomic number

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

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Electrolytes

Non-volatile solids

Volatile solids

Volatile liquids

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

Which of the following solutions has the highest boiling point

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5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling points

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

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Bohr's model of atom is contradicted by

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Planck quantum theory

Quartization of energy of electrons

Heisenberg's uncertainty principle

Quartization of angular members

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

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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

A limiting reactant is that one which

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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

Acetone and chloroform are soluble in each other due to

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Intermolecualr hydrogen bonding

Dipole-dipole interaction

Instantaneous dipoles

All of the above

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

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Its octet is complete

It is a monoatomic gas

It has very low polarizability

It has least forces of attraction

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

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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

Calcium has isotopes

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7

9

1

6

Which of the following molecules has zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

The unit of rate constant depends upon

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Number of reactants

Concentration terms

Order of reaction

Molecularity of reaction

Most of the reaction which give stable products are

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Exothermic

Endothermic

Isothermal

None of these

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

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

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Catalyst

Temperature

Moles dm^-3

Partial pressure

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1

2

3

None of these

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

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Around 0°C

Around room temperature

Sufficiently more than room temperature

Just above the room temperature

The rate of reaction

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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

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

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1.0

2.0

3.0

4.0

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Heat of reaction

Heat of sublimation

Heat of neutralization

Heat of combustion

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

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Henry's law

Hess's law

Joule's principle

Law of combustion

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