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

Absolute temperature of a gas is proportional to

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Which of the following is the simplest form of matter?

Question # 11

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

Question # 12

Which of the following is the simplest form of matter?

Question # 13

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

Question # 14

Gases show uniform behaviour towards their

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

In gases and liquids, temperature is the measure of :

Question # 20

Liquids are less common than

Question # 21

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

Question # 22

The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are

Question # 23

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

Question # 24

In Solids, the temperature is the measure of

Question # 25

Gases exert pressure on walls of container because the gas molecules

Question # 26

All gases can be compressed by

Question # 27

Cooling happens under the Joule Thomson Effect due to sudden

Question # 28

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

Question # 29

In solids, the temperature of is the measure of

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
2 Absolute temperature of a gas is proportional to
A. Rotational kinetic energy
B. Translational kinetic energy
C. Vibrational kinetic energy
D. Potential energy
3 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
4 Boyle's law does not fall even
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gases is taken
D. all of above
5 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
6 A graph between P and 1/V at constant temperature and number moles of a gas meets the
A. y-axis
B. x-axis
C. origin
D. none of above
7 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
8 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.
9 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
10 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

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