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Online Tests
ECAT Chemistry Chapter 4 Liquids & Solids Online Test MCQs With Answers
Question # 1
Which one of the following is weakest inter molecular force?
Choose an answer
Dipole induced dipole forces
Ionic dipole forces
Electrostatic forces b/w ions
Dipole dipole forces
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Question # 2
The gases can be converted into liquids by:
Choose an answer
Increasing the pressure only.
Lowering temperature and increasing pressure
Increasing pressure and bringing temperature below critical points
Lowering temperature only
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Question # 3
At sea level and at 100
°C the vapor pressure of water in an open system is:
Choose an answer
1000 mm Hg
760 mm Hg
730 mm Hg
670 mm Hg
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Question # 4
Which of the following is a pseudo solid?
Choose an answer
CaF
2
Glass
NaCL
All
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Question # 5
London dispersion forces are alos called:
Choose an answer
Hydrogen bonding.
Debye forces
Van der Waal's forces
Instantaneous dipole-induced dipole forces.
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Question # 6
Debye forces are present in on of the following pairs:
Choose an answer
Na+ion and water
Argon and water
Argon and Na+ion
Ne and water
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Question # 7
Polypeptide chains are coiled about one another into a spiral by
Choose an answer
Ionic bonds
Covalent bonds
Van der Waal's forces
Hydrogen bonds
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Question # 8
Force of attraction b/w atoms of He is :
Choose an answer
London dispersion forces
Hydrogen bonding
Coordinate covalent bond
Covalent bond
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Question # 9
Evaporation of water is possible at:
Choose an answer
Above 100
°C
0
°C
100
°C
At all temperature
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Question # 10
The density of water decreases, When it is freezed at 0
°
C
Choose an answer
Change of bond length
Change of bond angles
Cubic structure of ice
Empty spaces present in the structure of ice
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Question # 11
]Which of the following is a pseudo solid?
Choose an answer
Atoms of He is gaseous stat at high temperate.
Molecules of water in liquid state.
Molecules of solid l
2
Molecular of hydrochloric acid gas
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Question # 12
Diamond is a bad conductor because:
Choose an answer
It
has tight structure
It has a high density
There is no free electron present in the crystal of diamond of conduct electricity is transparent to light
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Question # 13
The strongest forces are
Choose an answer
Debye forces
London dispersion forces
Dipole-dipole attraction
Hydrogen
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Question # 14
The intermolecular forces in liquids are
Choose an answer
Negligible
Very weak
Very strong
Reasonably strong
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Question # 15
Rate of evaporation and rate of condensation at equilibrium
Choose an answer
Become very low
Become very high
Become equal
Can never be equal
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Question # 16
Force of attraction between atoms of He is
Choose an answer
London dispersion forces
Hydrogen bondign
Coordinate covalent bond
Covalent bond
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Question # 17
In a group on going downward, polarizability generally
Choose an answer
Decreases
Increases
Remains constant
Negligible
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Question # 18
Which of the following is a pseudo solid
Choose an answer
CaF
2
Glass
NaCl
All
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Next
Question # 19
London dispersion forces are also called:
Choose an answer
Hydrogen bonding.
Debye forces
Van der Waal's forces
Instantaneous dipole-induced dipole forces.
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Question # 20
Escape of high energy molecules from the surface of a liquid is called
Choose an answer
Sublimation
Distillation
Condensation
Evaporation
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Question # 21
H
2
S is a gas which H
2
O is liquid at room temperature. it is due to
Choose an answer
Less intermolecular forces in water
Covalent bond in H-O in water molecule
Hydrogen bonding in water molecules
Ionic characters in water molecules
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Question # 22
Evaporation of water is possible at
Choose an answer
Above 100
0
0
0
100
0
At all temperature
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Question # 23
Which one of the following is the weakest intermolecular force
Choose an answer
Dipole induced dipole forces
Ionic dipole forces
Electrostatics forces between ions
Dipole-dipole forces
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Question # 24
Hydrocarbon molecule with large chain lengths experience:
Choose an answer
Weaker attractive forces
Stronger attractive forces
Repulsive forces
No attractive forces
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Question # 25
The boiling point of NH
3 is maximum among the hydrides of group V elementsdue to:
Choose an answer
Enhanced electronegative character of Nitrogen
Pyramidal structure of NH3
Very small size of Nitrogen.
Enhanced electropositive character of Nitrogen
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Question # 26
In a group on going downward, polarizability generally:
Choose an answer
Decreases
Increases
Remain constant
Negligible
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Question # 27
Amorphous solids
Choose an answer
Have sharp melting point
Undergo clean cleavage when cut with knife
Have perfect arrangement of atoms
Can possesses small regions of orderly arrangement of atoms
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Question # 28
Rate of evaporation and rate of condensation at equilibrium:
Choose an answer
Become very low
Become very high
Become equal
Can never be equal.
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Question # 29
The boiling point of NH
3
is maximum among the hydrides of group V elements due to
Choose an answer
Enhanced electronegative character of Nitrogen
Pyramidal structure of NH
3
Very small size of Nitrogen
Enhanced electropositive character of Nitrogen
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Question # 30
The gases can be converted into liquids by
Choose an answer
increasing the pressure only
Lowering temperature and increasing pressure
Increasing pressure and bringing temperature below critical point
Lowering temperature only
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