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

Boyle's law is represented as :

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

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

In gases and liquids, temperature is the measure of :

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Boyle's law does not fall even

Question # 15

The rate of diffusion of a gas is :

Question # 16

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

Question # 17

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

Question # 18

Which Statement about gases is not correct?

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

The intramolecular forces in gases are

Question # 23

The intramolecular force in gases are :

Question # 24

Gases exert pressure on walls of container because the gas molecules

Question # 25

In gases and liquids, temperature is the measure of

Question # 26

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

Question # 27

Liquids are less common than :

Question # 28

Gases shows uniform behavior toward their :

Question # 29

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

Question # 30

The molar value of CO2 is maximum at :

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ECAT Class Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 Which statement about gases is not correct ?
A. The spread throughout the vessel.
B. Pressure is due to collision
C. There are large spaces between the molecules.
D. molecules are arranged regularly.
3

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

6.02/22.4


B.

12.04/22.4 *1023


C.

18/22.4*1023

D.

55.6*6.02*1023 * 1023
4 The ratio of volume to temperature on Kelvin scale is constant according to
A. Charle's law
B. Newton's law
C. Coulomb's law
D. Boyle's law
5 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
6 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
7 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
8 The molar value of CO2 is maximum at :
A. STP
B. 127°C and 1 atm
C. 0°C and 2 atm
D. 273°C and 2 atm
9 Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid State
C. Solid State
D. All of above
10 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion

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