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

Which of the following is a pseudo solid

Question # 2

Rate of evaporation and rate of condensation at equilibrium

Question # 3

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

Question # 4

Hydrocarbon molecule with large chain lengths experience:

Question # 5

The gases can be converted into liquids by

Question # 6

The intermolecular forces in liquids are

Question # 7

HF has exceptionally low acidic strength due to:

Question # 8

Force of attraction b/w atoms of He is :

Question # 9

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

Question # 10

The molecules of CO2 in dry ice from the :

Question # 11

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

Question # 12

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

Question # 13

Hydrogen bonding is present in one of the following pairs:

Question # 14

Amorphous solids:

Question # 15

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

Question # 16

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

Question # 17

Which one of the following is weakest inter molecular force?

Question # 18

]Which of the following is a pseudo solid?

Question # 19

Which of the following is a pseudo solid?

Question # 20

The inter-molecular forces in liquids are:

Question # 21

Evaporation of water is possible at:

Question # 22

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

Question # 23

Ionic solids are characterized by :

Question # 24

London dispersion forces are also called:

Question # 25

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

Question # 26

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

Question # 27

Debye forces are present in one of the following pairs

Question # 28

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

Question # 29

In a group on going downward, polarizability generally

Question # 30

Polypeptide chains are coiled about one another into a spiral by

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Sr.# Question Answer
1 Hydrogen bonding is present between the molecules of
A. NH3
B. H2O
C. HF
D. All of above
2 Ionic Solids are characterized by
A. Low melting points
B. Good conductivity in solid state
C. High vapour pressure
D. Solubility in polar solvents
3 Hydrocarbon molecules with large chain lengths experience
A. Weaker attractive forces
B. Stronger attractive forces
C. Repulsive forces
D. No attractive forces
4 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
5 In a group on going downward, polarizability generally
A. Decreases
B. Increases
C. Remains constant
D. Negligible
6 Polypeptide chains are coiled about one another into a spiral by
A. Ionic bonds
B. Covalent bonds
C. Van der Waal's forces
D. Hydrogen bonds
7 Hydrogen bonding is present in one of the following pairs:
A. NH3
B. H2O
C. HF
D. All of above
8 In a group on going downward, polarizability generally:
A. Decreases
B. Increases
C. Remain constant
D. Negligible
9 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
10 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
11 Debye forces are present in on of the following pairs:
A. Na+ion and water
B. Argon and water
C. Argon and Na+ion
D. Ne and water
12 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
13 The inter-molecular forces in liquids are:
A. Negligible
B. Very weak
C. Very strong
D. Reasonably strong
14 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
15 Amorphous solids
A. Have sharp melting point
B. Undergo clean cleavage when cut with knife
C. Have perfect arrangement of atoms
D. Can possesses small regions of orderly arrangement of atoms
16 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
17 Debye forces are present in one of the following pairs
A. Na+ion and water
B. Argon and water
C. Argon and Na+ion
D. Ne and Water
18 Hydrocarbon molecule with large chain lengths experience:
A. Weaker attractive forces
B. Stronger attractive forces
C. Repulsive forces
D. No attractive forces
19 Which of the following is a pseudo solid
A. CaF2
B. Glass
C. NaCl
D. All
20 The strongest forces are:
A. Debye froces
B. London dispersion
C. Dipole-dipole attraction
D. Hydrogen bonding
21 Force of attraction between atoms of He is
A. London dispersion forces
B. Hydrogen bondign
C. Coordinate covalent bond
D. Covalent bond
22 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
23 Ionic solids are characterized by :
A. Low meeting points
B. Good conductivity in solid state
C. High vapor pressure
D. Solubility in polar solvents
24 Force of attraction b/w atoms of He is :
A. London dispersion forces
B. Hydrogen bonding
C. Coordinate covalent bond
D. Covalent bond
25 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
26 Which one of the following is the weakest intermolecular force
A. Dipole induced dipole forces
B. Ionic dipole forces
C. Electrostatics forces between ions
D. Dipole-dipole forces
27 Heat of vapourization for liquids with strong dipole-dipole forces will have
A. Negligible Values
B. Reasonably high values
C. Very high values
D. very low values
28 The intermolecular forces in liquids are
A. Negligible
B. Very weak
C. Very strong
D. Reasonably strong
29 Chloroform and acetone are soluble in each other due to:
A. Instantaneous dipole interactions.
B. Dipole-dipole interactions.
C. Inter molecular hydrogen bonding.
D. All of above
30 At sea level and at 1000C the vapour pressure of water in an open system is
A. 1000 mm Hg
B. 760 mm Hg
C. 730 mm Hg
D. 670 mm Hg

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