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

Question # 2

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

Question # 3

Keeping the temperature constant, if the gas is expanded

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

In gases and liquids, temperature is the measure of :

Question # 8

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

Question # 9

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

Question # 10

Gases exert pressure on walls of container because the gas molecules

Question # 11

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

Question # 12

In gases and liquids, temperature is the measure of

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Absolute temperature of a gas is proportional to

Question # 18

Gases shows uniform behavior toward their :

Question # 19

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

Question # 20

In solids, the temperature of is the measure of

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

Boyle's law is represented as :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above
5 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
6 Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :
A. 1/2
B. 8/9
C. 1/9
D. 16/17
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 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
9 Boyle's law is represented as :
A.

P∞ 1/T

B. V and 1/P
C. P∞P
D. P∞1/P
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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