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 also called

Question # 2

Ionic solids are characterized by :

Question # 3

The intermolecular forces in liquids are

Question # 4

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

Question # 5

Which of the following is a pseudo solid

Question # 6

The gases can be converted into liquids by

Question # 7

Chloroform and acetone are soluble in each other due to:

Question # 8

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

Question # 9

Amorphous solids

Question # 10

A liquid on evaporation causes:

Question # 11

The strongest forces are:

Question # 12

The strongest forces are

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

HF has exceptionally low acidic strengths due to

Question # 18

The inter-molecular forces in liquids are:

Question # 19

Amorphous solids:

Question # 20

Force of attraction between atoms of He is

Question # 21

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

Question # 22

Which of the following is a pseudo solid?

Question # 23

The molecules of CO2in dry ice from the

Question # 24

Hydrogen bonding is present between the molecules of

Question # 25

The molecules of CO2 in dry ice from the :

Question # 26

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

Question # 27

Chloroform and acetone are soluble in each other due to

Question # 28

The only forces are London dispersion forces among the

Question # 29

Debye forces are present in one of the following pairs

Question # 30

]Which of the following is a pseudo solid?

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ECAT Chemistry Chapter 4 Important MCQ's

Sr.# Question Answer
1 Diamond is a bad conductor because:
A. Ithas tight structure
B. It has a high density
C. There is no free electron present in the crystal of diamond of conduct electricity is transparent to light
2 London dispersion forces are also called:
A. Hydrogen bonding.
B. Debye forces
C. Van der Waal's forces
D. Instantaneous dipole-induced dipole forces.
3 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
4 Diamond is a bad conductor because
A. It has a tight structure
B. It has a high density
C. there is no free electron present in the crystal of diamond of conduct electicity
D. Is transparent to light
5 The density of water decreases, when it is freezed at 0oC because of
A. Change of bond lengths
B. Change of bond angles
C. Cubic structure of ice
D. Empty spaces present in the structure of Ice
6 The molecules of CO2 in dry ice from the :
A. Ionic crystals
B. Coverlet crystals
C. Molecular crystals
D. Any type of crystals
7 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
8 Hydrocarbon molecules with large chain lengths experience
A. Weaker attractive forces
B. Stronger attractive forces
C. Repulsive forces
D. No attractive forces
9 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
10 In a group on going downward, polarizability generally:
A. Decreases
B. Increases
C. Remain constant
D. Negligible

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