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 show uniform behaviour towards their

Question # 2

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

Question # 3

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

Question # 4

Cooling happens under the Joule Thomson Effect due to sudden

Question # 5

Which of the following is the simplest form of matter?

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

All gases can be compressed by

Question # 10

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

Question # 11

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

Question # 12

The intramolecular force in gases are :

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Absolute temperature of a gas is proportional to

Question # 25

Liquids are less common than

Question # 26

Gases exert pressure on walls of container because the gas molecules

Question # 27

Liquids are less common than :

Question # 28

Which statement about gases is not correct ?

Question # 29

The rate of diffusion of a gas is :

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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.
2 According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:
A. V and T
B. P and V
C. P and 1/V
D. P and PV
3 The intramolecular force in gases are :
A. Weak
B. Normal
C. Very weak
D. Strong
4 Liquids are less common than :
A. Solids
B. Plasmas
C. Gases
D. All of above
5 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
6 Gases of air, always remain in random motion and do not settle due to
A. Difference in molecular masses of air gases
B. Difference in partial pressure of gas molecules
C. Unequal number of different gas molecules
D. Elastic collision of gas molecules
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 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above
9 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. Y-axis
B. Z-axis
C. X-axis
D. None of above
10 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.

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