ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 3 Gases

Try The MCQ's Test For ECAT Chemistry Chapter 3 Gases

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ECAT Chemistry Chapter 3 Gases

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Question # 1

In Boyle's law which of the following pair remains constant :

Question # 2

Number of molecules in one dm3 of water is close to :

Question # 3

Boyle's law doesn't fail even :

Question # 4

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be

Question # 5

Which of the following is the simplest form of matter?

Question # 6

Cooling happens under the Joule Thomson Effect due to sudden

Question # 7

The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are

Question # 8

Absolute temperature of a gas is proportional to

Question # 9

Gases of air, always remain in random motion and do not settle due to

Question # 10

All gases can be compressed by

Question # 11

The rate of diffusion of a gas in

Question # 12

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

Question # 13

According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:

Question # 14

In gases and liquids, temperature is the measure of :

Question # 15

The highest temperature at which a substance can exist as a liquid is called its

Question # 16

The product of pressure and volume remains constant when temperature and quantity of gas is

Question # 17

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :

Question # 18

For a gas obeying Boyle's law if pressure is doubled, the volume becomes

Question # 19

Gases of air always remain in random motion and do not settle due to :

Question # 20

In Boyle's law which of the following pair is variable

Question # 21

For a gas obeying Boyle's law if pressure is doubled, the volume becomes :

Question # 22

In gases and liquids, temperature is the measure of

Question # 23

Liquids are less common than

Question # 24

According to Boyle's law. which parameters give a straight line parallel to x-axis, when we plot a graph between

Question # 25

The ratio of volume to temperature on Kelvin scale is constant according to

Question # 26

Boyle's law is represented as :

Question # 27

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

Question # 28

A real gas obeying van der Waals' equation will resemble ideal gas if :

Question # 29

The deviation of a gas from ideal behavior is maximum at :

Question # 30

Which statement about gases is not correct ?

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 In Boyle's law which of the following pair is variable :
A. Temperature and quantity of a gas.
B. Pressure and volume
C. Volume and quantity of a gas.
D. Pressure and quantity of a gas.
2 The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to
A. Viscosity
B. Molar mass
C. Momentum
D. All of above
3

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?
A. Temperature is lowered and pressure is increased
B. Temperature is increasedand pressure is lowered
C. Temperature and pressure both are lowered
D. Temperature and pressure both are increased
4 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above
5 The rate of diffusion of a gas in
A. Inversely proportional to its density
B. Inversely proportional to square root of its molecular mass
C. Directly proportional to molecular mass
D. Directly proportional to its density
6 According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:
A. V and T
B. P and V
C. P and 1/V
D. P and PV
7 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. Y-axis
B. Z-axis
C. X-axis
D. None of above
8 Gases of air always remain in random motion and do not settle due to :
A. Difference in molecular masses of air gases.
B. Difference in partial pressure of gas molecules.
C. Unequal number of different gas molecules.
D. Elastic collision of gas molecules.
9 Gases exert pressure on walls of container because the gas molecules
A. Obey gas laws
B. Have definite volume
C. Collide with the walls of container
D. Collide with each other
10 Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :
A. 1/2
B. 8/9
C. 1/9
D. 16/17

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