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

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

Question # 2

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

Question # 3

Gases exert pressure on walls of container because the gas molecules

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Which of the following is the simplest form of matter?

Question # 9

Gases shows uniform behavior toward their :

Question # 10

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

Question # 11

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

Question # 12

Boyle's law doesn't fail even :

Question # 13

The intramolecular force in gases are :

Question # 14

The rate of diffusion of a gas is :

Question # 15

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

Question # 16

Liquids are less common than :

Question # 17

Which of the following is the simplest form of matter?

Question # 18

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

Question # 19

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

Question # 20

Liquids are less common than

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Gases show uniform behaviour towards their

Question # 28

All gases can be compressed by :

Question # 29

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 30

In gases and liquids, temperature is the measure of

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 The intramolecular forces in gases are
A. Weak
B. Normal
C. Very weak
D. Strong
2 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
3 The rate of diffusion of a gas is :
A. Inversely proportional to its density
B. Inversely proportional to square root of its molecular mass
C. Directly proportional to molecular mass
D. Directly proportional to its density
4 For a gas obeying Boyle's law if pressure is doubled, the volume becomes :
A. Remain constant
B. Double
C. One half
D. None of above
5 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.
6 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
7 The deviation of a gas from ideal behavior is maximum at :
A. -10°C and 5.0 atm
B. -10°C and 2.0 atm
C. 100°C and 2.0 atm
D. 0°C and 2.0 atm
8 The rate of diffusion of a gas in
A. Inversely proportional to its density
B. Inversely proportional to square root of its molecular mass
C. Directly proportional to molecular mass
D. Directly proportional to its density
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 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

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