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 exert pressure on walls of container because the gas molecules :

Question # 2

Which statement about gases is not correct ?

Question # 3

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

Question # 4

The rate of diffusion of a gas in

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

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

Question # 8

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

Question # 9

In gases and liquids, temperature is the measure of

Question # 10

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

Question # 11

Gases shows uniform behavior toward their :

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Cooling happens under the Joule Thomson Effect due to sudden

Question # 16

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

Question # 17

Boyle's law is represented as :

Question # 18

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

Question # 19

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

Question # 20

The intramolecular forces in gases are

Question # 21

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

Question # 22

Boyle's law does not fall even

Question # 23

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

Question # 24

Liquids are less common than :

Question # 25

Gases show uniform behaviour towards their

Question # 26

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

Question # 27

At constant temperature when pressure of a gas is plotted against volume, the curve is

Question # 28

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

Question # 29

The intramolecular force in gases are :

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 At constant temperature when pressure of a gas is plotted against volume, the curve is
A. Slanting straight line
B. Parabolic
C. Staight line, parallel to pressure axis
D. OF neither type
4 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
5 Keeping the temperature constant, if the gas is expanded
A. kinetic energy of molecules will increase
B. Number of gas molecules increases
C. Temperature will increases
D. Pressure will decrease
6 Boyle's law doesn't fail even :
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gas is taken
D. All of above
7 Gases exert pressure on walls of container because the gas molecules :
A. Obey gas laws.
B. Have definite volume.
C. Collide with the walls of container.
D. Collide with each other.
8 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above
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 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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