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

Which of the following is the simplest form of matter?

Question # 2

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

Question # 3

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

Question # 4

Gases exert pressure on walls of container because the gas molecules

Question # 5

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

Question # 6

Which statement about gases is not correct ?

Question # 7

Cooling happens under the Joule Thomson Effect due to sudden

Question # 8

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

Question # 9

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

Question # 10

Boyle's law doesn't fail even :

Question # 11

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

Question # 12

The rate of diffusion of a gas is :

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

Boyle's law does not fall even

Question # 17

All gases can be compressed by

Question # 18

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

Question # 19

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

Question # 20

A graph between P and 1/V at constant temperature and number moles of a gas meets the

Question # 21

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

Question # 22

Gases shows uniform behavior toward their :

Question # 23

Boyle's law is represented as :

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

The intramolecular force in gases are :

Question # 28

In solids, the temperature of is the measure of

Question # 29

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

Question # 30

Liquids are less common than

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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.
2 The intramolecular forces in gases are
A. Weak
B. Normal
C. Very weak
D. Strong
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 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
5 All gases can be compressed by
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of above
6 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be
A. Remain unchanged
B. Doubled
C. Reduced
D. Increased four times
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 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
9 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
10

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

546

B. 200
C. 546K
D. 273K

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