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

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

Question # 2

The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :

Question # 3

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

Question # 4

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

Question # 5

The intramolecular forces in gases are

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

The intramolecular force in gases are :

Question # 10

Keeping the temperature constant, if the gas is expanded

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

All gases can be compressed by :

Question # 15

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

Question # 16

All gases can be compressed by

Question # 17

Liquids are less common than :

Question # 18

In gases and liquids, temperature is the measure of

Question # 19

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

Question # 20

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

Question # 21

Liquids are less common than

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

The rate of diffusion of a gas in

Question # 26

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

Question # 27

Gases show uniform behaviour towards their

Question # 28

Which Statement about gases is not correct?

Question # 29

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

Question # 30

The rate of diffusion of a gas is :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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.
2 All gases can be compressed by :
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of the 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 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
5 The intramolecular forces in gases are
A. Weak
B. Normal
C. Very weak
D. Strong
6 A real gas obeying van der Waals' equation will resemble ideal gas if :
A. both 'a' and 'b' are large
B. both 'a' and 'b' are small
C. 'a' is small and 'b' is large
D. 'a' is large and 'b' is small
7 At constant temperature when pressure of a gas is plotted against volume, the curve is
A. Slanting straight line
B. Parabolic
C. Staight line, parallel to pressure axis
D. OF neither type
8

Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid state
C. Solid state
D. All of above
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 molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion

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