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Online Tests
MDCAT Chemistry Chapter 3 Gases Online Test MCQs With Answers
Question # 1
The actual volume of gas molecules is considered negligible at following pressures
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2atm
4atm
6 atm
8 atm
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Question # 2
An ideal gas, obeying Kinetic theory of gases cannot be liquified, because
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its critical temperature is above 0°C
its molecules are relatively small in size
It solidifies before becoming a liquid
Forces acting between its molecules are negligible
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Question # 3
The motion imparted to the gas molecules by gravity is
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very small
very large
negligible
appreciable
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Question # 4
If volume of an ideal gas at 0°C 536cm3, what is volume at 1°C
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373 cm3
646 cm3
Becomes 0cm3
746 cm3
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Question # 5
At constant volume, for a fixed number of moles of a gas the pressure of the gas increases with size of temperature due to
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increase in average molecular speed
increase in number of moles
increase in molecular attraction
decrease in the distance between the molecules
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Question # 6
Density of a gas increases by
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increasing value of R
decreasing value of R
increasing T
decreasing T
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Question # 7
According to the general gas equation, density of an ideal gas depends upon
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Pressure
Temperature
Molar mass of the gas
All of the above
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Question # 8
If volume of an ideal gas at 0C° 536cm3, what is volume at 1°C
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373 cm3
646 cm3
Becomes 0cm3
746 cm3
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Question # 9
If a gas expands at constant temperature
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The pressure decreases
The Kinetic energy of the molecules remains the same
The kinetic energy of the molecules decreases
The number of molecules of the gas increase
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Question # 10
Which is not true in case of an ideal gas?
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It cannot be converted into a liquid
There is no interaction between the molecules
All molecules of the gas move with same speed
At a given temperature P'V is proportional to the amount of the gas
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Question # 11
The pressure exerted by gas molecules is due to their
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collisions
densities
masses
kinetic energy
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Question # 12
Which of the statement is applicable for both ideal and real gases molecules?
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Have no forces of attraction
Collisions between the molecules is elastic
Molecules are in random movement
The actual volume of gas is negligible as compared to the volume of gas
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Question # 13
The relationship between density and molar mass of a gas is
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Directly proportional
Inversly proportional
Straight line
Stoichiometric
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Question # 14
Under which condition CO has the maximum molar volume
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high T and P
Low T and High p
high T and low P
Low T and low P
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Question # 15
.The number of moles in 2.24 dm3 of H2 gas at STP is:
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1
0.1
10
0.01
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Question # 16
Which of the following is the correct equation to calculate relative molecular mass of a gas
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M=mPRTV
M=mPR/VT
M=PV/mRT
M=mRT/PV
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Question # 17
What are the conditions under which the relation between volume (V) and number of moles (n) of gas is plotted? (Pressure; T-temperature)
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constant P and T
constant P and V
constant T and V
constant n and v
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Question # 18
At higher temperature isotherm of Boyle's law moves away from both axis, is due to increase in:
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pressure
No. of moles
Volume
All
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Question # 19
The volume of a real gas
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is constant
increases with T decrease
becomes zero at absolute zero
never becomes zero
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Question # 20
The pressure of gas at constant temperature in a container of 2dm3 is 10 atm what will be its final pressure if it is connected with 10 dm3 container
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2 atm
1.6 atm
5 atm
I atm
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Question # 21
Theoretically, the temperature at which volume of gas become equal to zero is called
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Boiling point of water
Zero absolute
Zero Kelvin
both B and C
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