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

London dispersion forces are alos called:

Question # 2

The inter-molecular forces in liquids are:

Question # 3

The gases can be converted into liquids by

Question # 4

London dispersion forces are also called:

Question # 5

Diamond is a bad conductor because

Question # 6

HF has exceptionally low acidic strength due to:

Question # 7

Hydrogen bonding is present in one of the following pairs:

Question # 8

The only forces are London dispersion forces among the

Question # 9

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

Question # 10

Chloroform and acetone are soluble in each other due to:

Question # 11

Polypeptide chains are coiled about one another into a spiral by:

Question # 12

Rate of evaporation and rate of condensation at equilibrium

Question # 13

Evaporation of water is possible at

Question # 14

Ionic solids are characterized by :

Question # 15

Which one of the following is the weakest intermolecular force

Question # 16

In a group on going downward, polarizability generally:

Question # 17

Rate of evaporation and rate of condensation at equilibrium:

Question # 18

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

Question # 19

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

Question # 20

Which of the following liquids has low vapour pressure at 250C

Question # 21

A liquid on evaporation causes:

Question # 22

In a group on going downward, polarizability generally

Question # 23

The molecules of CO2in dry ice from the

Question # 24

Force of attraction between atoms of He is

Question # 25

H2S is a gas which H2O is liquid at room temperature. it is due to

Question # 26

]Which of the following is a pseudo solid?

Question # 27

Force of attraction b/w atoms of He is :

Question # 28

The intermolecular forces in liquids are

Question # 29

A liquid on evaporation causes

Question # 30

London dispersion forces are also called

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ECAT Chemistry Chapter 4 Important MCQ's

Sr.# Question Answer
1 London dispersion forces are also called:
A. Hydrogen bonding.
B. Debye forces
C. Van der Waal's forces
D. Instantaneous dipole-induced dipole forces.
2 The boiling point of NH3is maximum among the hydrides of group V elements due to
A. Enhanced electronegative character of Nitrogen
B. Pyramidal structure of NH3
C. Very small size of Nitrogen
D. Enhanced electropositive character of Nitrogen
3

Which of the following is a pseudo solid?

A.

CaF2

B.

Glass

C.

NaCL

D.

All
4 HF has exceptionally low acidic strengths due to
A. Smaller size of fluorine
B. Strong polar bond between H and F
C. Electronegativity of fluorine
D. Strong hydrogen bonding
5 Which of the following liquids has low vapour pressure at 25°C:
A. Diethyl ether
B. Acetone.
C. Water.
D. Ethyl alcohol.
6 The density of water decreases, When it is freezed at 0°C
A. Change of bond length
B. Change of bond angles
C. Cubic structure of ice
D. Empty spaces present in the structure of ice
7 The intermolecular forces in liquids are
A. Negligible
B. Very weak
C. Very strong
D. Reasonably strong
8 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 points
D. Lowering temperature only
9 HF has exceptionally low acidic strength due to:
A. Smaller size of fluorine.
B. Stronger polar bond between H and F.
C. Electronegativity of fluorine
D. Strong hydrogen bonding
10 The boiling point of NH3 is maximum among the hydrides of group V elementsdue to:
A. Enhanced electronegative character of Nitrogen
B. Pyramidal structure of NH3
C. Very small size of Nitrogen.
D. Enhanced electropositive character of Nitrogen

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