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

Keeping the temperature constant, if the gas is expanded

Question # 2

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

Question # 3

The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to

Question # 4

The rate of diffusion of a gas is :

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Which statement about gases is not correct ?

Question # 9

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

Question # 10

The molar value of CO2 is maximum at :

Question # 11

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

Question # 12

In gases and liquids, temperature is the measure of

Question # 13

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

Question # 14

The density of a gas is directly and volume at constant temperature for a gas is

Question # 15

In Solids, the temperature is the measure of

Question # 16

In solids, the temperature of is the measure of

Question # 17

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

Question # 18

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

Question # 19

Which of the following is the simplest form of matter?

Question # 20

The rate of diffusion of a gas in

Question # 21

At constant temperature when pressure of a gas is plotted against volume, the curve is

Question # 22

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

Question # 23

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

Question # 24

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?

Question # 25

In gases and liquids, temperature is the measure of :

Question # 26

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

Question # 27

Boyle's law is represented as :

Question # 28

The movement of gas molecules from a region of high pressure to vacuum is called

Question # 29

Liquids are less common than :

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 In Boyle's law which of the following pair remains constant
A. Temperature and quality of a gas
B. Pressure and quality of a gas
C. Temperature and pressure
D. Temperature and quantity of a gas
2 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
3 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
4 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.
5 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :
A. remain unchanged
B. increase four times
C. reduce to 1/4
D. be doubled
6 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
7 Boyle's law doesn't fail even :
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gas is taken
D. All of above
8 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.
9 Absolute temperature of a gas is proportional to
A. Rotational kinetic energy
B. Translational kinetic energy
C. Vibrational kinetic energy
D. Potential energy
10 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above

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