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

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

Question # 2

Keeping the temperature constant, if the gas is expanded

Question # 3

Which statement about gases is not correct ?

Question # 4

The intramolecular force in gases are :

Question # 5

The intramolecular forces in gases are

Question # 6

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

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

Which Statement about gases is not correct?

Question # 9

In solids, the temperature of is the measure of

Question # 10

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

Question # 11

In gases and liquids, temperature is the measure of :

Question # 12

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

Question # 13

Which of the following is the simplest form of matter?

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

The rate of diffusion of a gas in

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

Liquids are less common than

Question # 24

Boyle's law is represented as :

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

In gases and liquids, temperature is the measure of

Question # 29

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

Question # 30

Which of the following is the simplest form of matter?

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 In gases and liquids, temperature is the measure of :
A. Average transnational kinetic energies of molecules.
B. Average vibrational kinetic energies of molecules.
C. Average rotational kinetic energies of molecules.
D. None of above
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 Liquids are less common than :
A. Solids
B. Plasmas
C. Gases
D. All of above
4 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
5 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
6 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
7

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?
A. Temperature is lowered and pressure is increased
B. Temperature is increasedand pressure is lowered
C. Temperature and pressure both are lowered
D. Temperature and pressure both are increased
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 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above
10 Gases show uniform behaviour towards their
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above

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