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MDCAT Chemistry Chapter 4 Liquids Online Test MCQs With Answers
Question # 1
Halogens form halogen acids. HF is the weakest among all of them This is due to the reason that
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fluorine is a very small-sized atom
fluorine is highly electronegative atom
there is strong hydrogen bonding in HF
the polarity of HF bond is less
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Question # 2
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 # 3
The vapour pressure of a liquid depends upon
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amount of the liquid
surface area
temperature
size of container
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Question # 4
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 # 5
The B.P of glycerine at 760 torr pressure is
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200°C
290C°
250C°
262C°
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Question # 6
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 # 7
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 # 8
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 # 9
Strong dipole-dipole forces among the liquid molecules are responsible for
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very high heat of vaporization
very low heat of vaporization
cannot be predicted
negligible forces are these
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Question # 10
H-bonding is maximum in:
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ethanol
benzene
diethyl ether
water
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Question # 11
Ice floats on water because
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the hydrogen bonding in ice is stronger than that of in water
empty spaces are left in ice
ice has two-dimensional structure
the bond length of the oxygen and hydrogen bond is different in water and ice
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Question # 12
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 # 13
In order to maintain the boiling point of water at 110 C°, the extemal pressure should be
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550 torr
between 500 and 760 tor
between 760 and 1500 torr
any pressure can be maintained
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Question # 14
Hydrogen bonding is not present in which of following compound?
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Ammonia
Ethanol
Ether
Water
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Question # 15
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 # 16
lce occupies more space than liquid water
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9%
10%
11%
12%
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Question # 17
Oxygen and sulphur are present in VI-A group of the periodic table The hydride of oxygen i.e., H2O is liquid at room temperature but the hydride of sulphur (H2S) is a gas. This is due to
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greater bond angle of water than Hs
greater bond lengths in HS than H2O
hydrogen bonding in water
acidic character of HS
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