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

00:00
Question # 1

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

Question # 2

London dispersion forces are alos called:

Question # 3

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

Question # 4

Polypeptide chains are coiled about one another into a spiral by

Question # 5

Which one of the following is the weakest intermolecular force

Question # 6

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

Question # 7

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

Question # 8

The density of water decreases, When it is freezed at 0°C

Question # 9

The strongest forces are:

Question # 10

Evaporation of water is possible at:

Question # 11

Force of attraction between atoms of He is

Question # 12

London dispersion forces are also called:

Question # 13

HF has exceptionally low acidic strengths due to

Question # 14

Which of the following liquids has low vapour pressure at 25°C:

Question # 15

In a group on going downward, polarizability generally

Question # 16

Hydrocarbon molecule with large chain lengths experience:

Question # 17

The strongest forces are

Question # 18

The boiling point of NH3 is maximum among the hydrides of group V elementsdue to:

Question # 19

London dispersion forces are also called

Question # 20

HF has exceptionally low acidic strength due to:

Question # 21

Chloroform and acetone are soluble in each other due to

Question # 22

A liquid on evaporation causes:

Question # 23

The gases can be converted into liquids by:

Question # 24

Evaporation of water is possible at

Question # 25

Hydrocarbon molecules with large chain lengths experience

Question # 26

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

Question # 27

Amorphous solids:

Question # 28

Chloroform and acetone are soluble in each other due to:

Question # 29

Debye forces are present in one of the following pairs

Question # 30

Trend of boiling point of halogens from fluorine to Iodine is that it

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ECAT Class Chemistry Chapter 4 Important MCQ's

Sr.# Question Answer
1 In a group on going downward, polarizability generally:
A. Decreases
B. Increases
C. Remain constant
D. Negligible
2 Chloroform and acetone are soluble in each other due to
A. Instantaneous dipole interactions
B. Dipole-dipole interactions
C. Intermolecular hydrogen bonding
D. All of above
3 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
4 A liquid on evaporation causes
A. Heating effect
B. Cooling effect
C. Suffication
D. All of above
5 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
6 Ionic Solids are characterized by
A. Low melting points
B. Good conductivity in solid state
C. High vapour pressure
D. Solubility in polar solvents
7 H2S is a gas while H2O is a liquid at room temperature. It is due to:
A. Less inter-molecular forces in water.
B. Covalent bonding H-O in water molecule.
C. Hydrogen bonding in water molecules
D. Ionic character in water molecules
8 The inter-molecular forces in liquids are:
A. Negligible
B. Very weak
C. Very strong
D. Reasonably strong
9 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.
10 Which of the following liquids has low vapour pressure at 25°C:
A. Diethyl ether
B. Acetone.
C. Water.
D. Ethyl alcohol.

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