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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Boyle's law doesn't fail even :

Question # 7

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

Question # 8

Which of the following will have the same number of molecules at STP ?

Question # 9

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

Question # 10

Boyle's law is represented as :

Question # 11

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

Question # 12

Gases show uniform behaviour towards their

Question # 13

Cooling happens under the Joule Thomson Effect due to sudden

Question # 14

The graph between pressure and volume at constant temperature for a gas is

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

All gases can be compressed by

Question # 19

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 20

The rate of diffusion of a gas is :

Question # 21

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

Question # 22

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

Question # 23

Which statement about gases is not correct ?

Question # 24

Boyle's law does not fall even

Question # 25

Which Statement about gases is not correct?

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 For a gas obeying Boyle's law if pressure is doubled, the volume becomes
A. Remains constant
B. Double
C. One half
D. None of above
2 The density of a gas is directly and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
3 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
4 All gases can be compressed by :
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of the above
5 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
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 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above
8 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
9 The product of pressure and volume remains constant when temperature and quantity of gas is
A. zero
B. variable
C. kept constant
D. None of these
10 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.

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