Engineering Entrance Sample Papers

Gaseous State Multiple Choice Questions with Answers

questions on gaseous state

Gaseous state solved MCQ

Question 1
In the equation of sate of an ideal gas PV = nRT, the value of the universal gas constant would depend only on
A
None of these
B
The units of the measurement
C
The pressure of the gas
D
The nature of the gas
Question 2
Which set of conditions  represents easiest way to liquefy a gas?

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A
High temperature and low pressure
B
Low temperature and high pressure
C
Low temperature and low pressure
D
High temperature and high pressure
Question 3
In a closed flask of 5 litres, 1.0 g of H2 is heated from 300 to 600 K. which statement is not correct
A
The number of moles of gas increases
B
The energy of gaseous molecules increases
C
Pressure of the gas increases
D
The rate of collision increases
Question 4
If the average velocity of N2 molecule is 0.3 m / s at 27o C, then the velocity will be 0.6 m / s at
A
1200 K
B
1800 K
C
600 K
D
400 K
Question 5
Molecular weight of a gas that diffuses twice as rapidly as the gas with molecular weight 64 is
A
8
B
6.4
C
16
D
64
Question 6
If a gas is expanded at constant temperature

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A
The kinetic energy of the molecules remains the same
B
The pressure increases
C
The kinetic energy of the molecules decreases
D
The number of molecules of the gas increases
Question 7
A sample of O2 gas is collected over water at 23oC at a barometric pressure of 751 mm Hg (vapour pressure of water at 23o C is 21 mm Hg). The partial pressure of O2 gas in the sample collected is
A
1.02 atm
B
0.96 atm
C
751 mm Hg
D
21 mm Hg
Question 8
Gas deviates from ideal gas nature because molecules

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A
Attract each other
B
Are colourless
C
Contain covalent bond
D
Show Brownian movement
Question 9
At the same temperature and pressure, which of the following gases will have the highest kinetic energy per mole
A
Oxygen
B
Hydrogen
C
All the same
D
Methane
Question 10
Equal volumes of two gases which do not react together are enclosed in separate vessels. Their pressures at 100 mm and 400 mm respectively. If the two vessels are joined together, then what will be the pressure of the resulting mixture (temperature remaining constant)
A
500 mm
B
125 mm
C
250 mm
D
1000 mm
Question 11
With increase of pressure, the mean free path
A
Increases
B
Becomes zero
C
Decreases
D
Does not change
Question 12
Who among the following scientists has not done any important work on gases?

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A
Boyle
B
Charles
C
Faraday
D
Avogadro
Question 13
A gas of volume 100 cc is kept in a vessel at pressure 104 Pa maintained at temperature 24o C. If now the pressure is increased to 105 Pa, keeping the temperature constant, then the volume of the gas becomes
A
10 cc
B
100 cc
C
1000 cc
D
1 cc
Question 14
When an ideal gas undergoes unrestrained expansion, no cooling occurs because the molecules?
A
Exert no attractive force on each other
B
Collide without loss of energy
C
Do work equal to loss in kinetic energy
D
Are above the inversion temperature
Question 15
Which one of the following statements is wrong for gases?
A
Confined gas exerts uniform pressure on the walls of its container in all directions
B
Volume of the gas is equal to the volume of the container confining the gas
C
Mass of the gas cannot be determined by weighing a container in which it is enclosed
D
Gases do not have a definite shape and volume
Question 16
Weight of 112 ml of oxygen at NTP on liquefaction would be
A
0.32 g
B
0.64 g
C
0.16 g
D
0.96 g
Question 17
How will you separate mixture of two gases?
A
Grahams law of diffusion technique
B
Chromatography
C
Fractional distillation technique
D
Osmosis
Question 18
The r.m.s. velocity of a gas depends upon
A
Molecular mass only
B
Temperature and molecular mass of gas
C
None of these
D
Temperature only
Question 19
The temperature at which RMS velocity of SO2 molecules is half that of He molecules at 300 K is
A
150 K
B
600 K
C
900 K
D
1200 K
Question 20
At constant temperature, in a given mass of an ideal gas
A
The ratio of pressure and volume always remains constant
B
Pressure always remains constant
C
Volume always remains constant
D
The product of pressure and volume always remains constant
Question 21
In deriving the kinetic gas equation, use is made of the root mean square velocity of the molecules because it is
A
The most accurate form in which velocity can be used in these calculations
B
The square root of the average square velocity of the molecules
C
The most probable velocity of the molecules
D
The average velocity of the molecules
Question 22
In the equation of sate of an ideal gas PV = nRT, the value of the universal gas constant would depend only on
A
None of these
B
The nature of the gas
C
The units of the measurement
D
The pressure of the gas
There are 22 questions to complete.

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