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

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

Question # 2

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

Question # 3

Gases shows uniform behavior toward their :

Question # 4

Absolute temperature of a gas is proportional to

Question # 5

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

Question # 6

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

Question # 7

Cooling happens under the Joule Thomson Effect due to sudden

Question # 8

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

Question # 9

Gases exert pressure on walls of container because the gas molecules

Question # 10

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

Question # 11

The rate of diffusion of a gas in

Question # 12

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

Question # 13

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

Question # 14

Which Statement about gases is not correct?

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

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

Question # 17

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

Question # 18

Boyle's law doesn't fail even :

Question # 19

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

Question # 20

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

Question # 21

Liquids are less common than

Question # 22

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

Question # 23

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

Question # 24

The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS :

Question # 25

The molar value of CO2 is maximum at :

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Boyle's law does not fall even

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 The graph between pressure and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
2 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
3 All gases can be compressed by
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of above
4 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
5 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
6 In Boyle's law which of the following pair is variable
A. Temperature and quantity of a gas
B. Pressure and Volume
C. Volume and quantity of a gas
D. Pressure and quantity of a gas
7 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.
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 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 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. None of above
B. X-axis
C. Z-axis
D. Y-axis

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