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Online Tests
MDCAT Chemistry Chapter 4 Liquids Online Test MCQs With Answers
Question # 1
The boiling of water may be 120°C, when the external pressure is
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greater than 760 torr
less than 760 torr
equal to 760 torr
variable
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Question # 2
The nature of crystals formed due to London forces of interaction are
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molecular
metallic
ionic
covalent
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Question # 3
Dipole-induced dipole forces are also called
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dipole-dipole forces
ion-dipole forces
Debye forces
London-dispersion forces
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Question # 4
The polarizabilities of elements mostly increase down the group due to the reason that
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the atomic numbers increase
number of protons increase
number of shells increase along with increase of shielding effect
the behaviour of the elements remain the same
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Question # 5
Polarizability is responsible for intermolecular forces and it
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increases down the group
decreases down the group
almost remains the same
increased along a period
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Question # 6
At freezing point of water, the density decreases due to
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change of bond angles
change of bond lengths
cubic structure of ice
empty spaces present in the structure of ice
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Question # 7
Dipole-dipole interaction are present in the
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atoms of the He gas
molecules of CCl4
molecules of solid iodine
molecules of :NH3
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Question # 8
Vapour pressure of a substance does not depend upon:
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physical state of matter
temperature
intermolecular forces
surface area
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Question # 9
Hydrogen bonding is extensively present in proteins which form the spiral. The hydrogen bond being produced is between
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nitrogen and hydrogen atom
oxygen and hydrogen atom
carbon and hydrogen atom
oxygen and carbon atom
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Question # 10
Liquids evaporate at every temperature. When the temperature becomes constant for a liquid, then:
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rate of evaporation is greater than the rate of condensation
the rate of condensation is greater than the rate of evaporation
The rate of condensation and evaporation become equal
it depends upon the nature of the liquid
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Question # 11
The B.P. of compound is mostly raised by
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dipole-induced dipole interactions
london dispersion forces
intramolecular H-bonding
intermolecular H-bonding
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Question # 12
H2O and HF are the hydrides of the second period. Fluorine is more electronegative than oxygen. Anyhow, the boiling point of water is greater than that of HF. This is due to:
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water is more polar than HF
water has a bent structure
HF has a zig zag structure after making hydrogen bonding
the number of hydrogen bonds produced by water are greater than that of HF
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Question # 13
The forces which are present between the ions and the water molecules are known as
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dipole-induced dipole forces
dipole-dipole forces
ion-dipole forces
London dispersion forces
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Question # 14
Saturated hydrocarbons having carbon atoms more than 20 in a molecule are solids due to
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higher densities
higher molar masses
the chain, are more zig-zag
all are correct
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Question # 15
The boiling points of the halogens
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increases down the group
decreases down the group
remains constant
can not be predicted
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Question # 16
lce occupies more space than liquid water
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9%
10%
11%
12%
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Question # 17
The boiling point of H2O is 100°C while that of C2H5-OH is 78.5C°. The reason is that:
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H2O molecules are small-sized
the bond angles at oxygen atom are different
C2H5-group is electron donating
the number of H-bonds are greater in H20, than C2H5-OH
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Question # 18
The boiling point of higher alkanes are greater than those of lower alkanes due to reason that
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higher alkanes have greater number of atoms
the polarizabilities of higher alkanes are greater
higher alkanes have greater hydrogen bonding
higher alkanes have zig-zag structures
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Question # 19
The B.P of glycerine at 760 torr pressure is
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200°C
290C°
250C°
262C°
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Question # 20
Amount of heat absorbed when one mole of a solid melts into liquid form at its melting point is called:
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heat of vaporization
latent heat of fusion
molar heat of fusion
molar heat of sublimation
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