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

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

Question # 2

Gases exert pressure on walls of container because the gas molecules

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

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

All gases can be compressed by :

Question # 13

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

Question # 14

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

Question # 15

Which of the following is the simplest form of matter?

Question # 16

Boyle's law does not fall even

Question # 17

Boyle's law is represented as :

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

In gases and liquids, temperature is the measure of :

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

The rate of diffusion of a gas in

Question # 28

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

Question # 29

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

Question # 30

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

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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 of the following is the simplest form of matter?
A. Gaseous state
B. Liquid State
C. Solid State
D. All of above
3 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
4 The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS :
A. NH3 >SO2 >CL2 >CO2
B. NH3 >CO2 >SO2 >CL2
C. CL2 >SO2 >CO2 >NH3
D. NH3 >CO2>CL2 >SO2
5 All gases can be compressed by
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of above
6

Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid state
C. Solid state
D. All of above
7 Which Statement about gases is not correct?
A. They spread throughout the vessel
B. Pressure is due to collision
C. There are larger spaces between the molecules
D. Molecules are arranged regularly
8 Liquids are less common than :
A. Solids
B. Plasmas
C. Gases
D. All of above
9 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
10 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.

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