ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 3 Gases

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ECAT Chemistry Chapter 3 Gases

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Question # 1

The rate of diffusion of a gas in

Question # 2

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

Question # 3

Gases show uniform behaviour towards their

Question # 4

In gases and liquids, temperature is the measure of :

Question # 5

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

Question # 6

Gases shows uniform behavior toward their :

Question # 7

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

Question # 8

Which of the following is the simplest form of matter?

Question # 9

All gases can be compressed by

Question # 10

Liquids are less common than

Question # 11

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

Question # 12

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

Question # 13

The intramolecular forces in gases are

Question # 14

A graph between P and PV at constant temperature and number of mole is parallel to

Question # 15

A graph between P and 1/V at constant temperature and number moles of a gas meets the

Question # 16

Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?

Question # 17

In solids, the temperature of is the measure of

Question # 18

Keeping the temperature constant, if the gas is expanded

Question # 19

Boyle's law does not fall even

Question # 20

All gases can be compressed by :

Question # 21

Gases exert pressure on walls of container because the gas molecules :

Question # 22

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

Question # 23

Boyle's law doesn't fail even :

Question # 24

Liquids are less common than :

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Gases exert pressure on walls of container because the gas molecules

Question # 29

Cooling happens under the Joule Thomson Effect due to sudden

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
4 Boyle's law does not fall even
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gases is taken
D. all of above
5 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.
6 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
7 The highest temperature at which a substance can exist as a liquid is called its
A. Critical temperature
B. Zero temperature
C. Absolute temperature
D. None of above
8 Gases show uniform behaviour towards their
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
9 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
10

Pressure remaining constant, at which temperature volume of gas will become twice of what it is at 0°C ?
A.

546

B. 200
C. 546K
D. 273K

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