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

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

Question # 2

The rate of diffusion of a gas is :

Question # 3

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

Question # 4

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

Question # 5

In gases and liquids, temperature is the measure of :

Question # 6

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

Question # 7

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

Question # 8

Which Statement about gases is not correct?

Question # 9

Gases show uniform behaviour towards their

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Boyle's law does not fall even

Question # 18

The molar value of CO2 is maximum at :

Question # 19

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

Question # 20

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

Question # 21

In solids, the temperature of is the measure of

Question # 22

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

Question # 23

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

Question # 24

Gases exert pressure on walls of container because the gas molecules

Question # 25

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

Question # 26

The intramolecular forces in gases are

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

Gases shows uniform behavior toward their :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to
A. Viscosity
B. Molar mass
C. Momentum
D. All 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 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
4 The intramolecular forces in gases are
A. Weak
B. Normal
C. Very weak
D. Strong
5 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.
6 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
7 A graph between P and 1/V at constant temperature and number moles of a gas meets the
A. y-axis
B. x-axis
C. origin
D. none of above
8 In gases and liquids, temperature is the measure of :
A. Average transnational kinetic energies of molecules.
B. Average vibrational kinetic energies of molecules.
C. Average rotational kinetic energies of molecules.
D. None of above
9 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
10

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

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