ECAT Pre Engineering Chemistry Chapter 4 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 4 Liquids & Solids

Try The MCQ's Test For ECAT Chemistry Chapter 4 Liquids & Solids

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ECAT Chemistry Chapter 4 Liquids & Solids

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Question # 1

Evaporation of water is possible at

Question # 2

Force of attraction between atoms of He is

Question # 3

Evaporation of water is possible at:

Question # 4

Which one of the following is weakest inter molecular force?

Question # 5

Heat of vapourization for liquids with strong dipole-dipole forces will have

Question # 6

]Which of the following is a pseudo solid?

Question # 7

Debye forces are present in on of the following pairs:

Question # 8

Escape of high energy molecules from the surface of a liquid is called

Question # 9

Which of the following is a pseudo solid

Question # 10

The density of water decreases, when it is freezed at 0oC because of

Question # 11

The molecules of CO2 in dry ice from the :

Question # 12

Ionic Solids are characterized by

Question # 13

HF has exceptionally low acidic strengths due to

Question # 14

London dispersion forces are also called

Question # 15

The strongest forces are

Question # 16

Which one of the following is the weakest intermolecular force

Question # 17

Which of the following is a pseudo solid?

Question # 18

The strongest forces are:

Question # 19

Hydrogen bonding is present between the molecules of

Question # 20

H2S is a gas while H2O is a liquid at room temperature. It is due to:

Question # 21

The boiling point of NH3is maximum among the hydrides of group V elements due to

Question # 22

Rate of evaporation and rate of condensation at equilibrium

Question # 23

Polypeptide chains are coiled about one another into a spiral by

Question # 24

London dispersion forces are also called:

Question # 25

In a group on going downward, polarizability generally

Question # 26

Hydrocarbon molecule with large chain lengths experience:

Question # 27

Diamond is a bad conductor because

Question # 28

London dispersion forces are alos called:

Question # 29

Force of attraction b/w atoms of He is :

Question # 30

In a group on going downward, polarizability generally:

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ECAT Chemistry Chapter 4 Important MCQ's

Sr.# Question Answer
1 Which of the following liquids has low vapour pressure at 25°C:
A. Diethyl ether
B. Acetone.
C. Water.
D. Ethyl alcohol.
2 London dispersion forces are alos called:
A. Hydrogen bonding.
B. Debye forces
C. Van der Waal's forces
D. Instantaneous dipole-induced dipole forces.
3 Force of attraction b/w atoms of He is :
A. London dispersion forces
B. Hydrogen bonding
C. Coordinate covalent bond
D. Covalent bond
4 Rate of evaporation and rate of condensation at equilibrium:
A. Become very low
B. Become very high
C. Become equal
D. Can never be equal.
5 Amorphous solids:
A. Have a sharp melting point
B. Undergo clean cleavage when cut with knife
C. Have a perfect arrangement of atoms
D. Can possesses small regions of orderly arrangement of atoms
6 Hydrocarbon molecule with large chain lengths experience:
A. Weaker attractive forces
B. Stronger attractive forces
C. Repulsive forces
D. No attractive forces
7 The intermolecular forces in liquids are
A. Negligible
B. Very weak
C. Very strong
D. Reasonably strong
8 Hydrogen bonding is present between the molecules of
A. NH3
B. H2O
C. HF
D. All of above
9 At sea level and at 100°C the vapor pressure of water in an open system is:
A. 1000 mm Hg
B. 760 mm Hg
C. 730 mm Hg
D. 670 mm Hg
10 The gases can be converted into liquids by
A. increasing the pressure only
B. Lowering temperature and increasing pressure
C. Increasing pressure and bringing temperature below critical point
D. Lowering temperature only

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