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

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

Question # 2

All gases can be compressed by

Question # 3

The molar value of CO2 is maximum at :

Question # 4

Keeping the temperature constant, if the gas is expanded

Question # 5

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

Question # 6

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

Question # 7

Gases exert pressure on walls of container because the gas molecules

Question # 8

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

Question # 9

Liquids are less common than

Question # 10

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

Question # 11

Boyle's law doesn't fail even :

Question # 12

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

Question # 13

All gases can be compressed by :

Question # 14

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

Question # 15

In gases and liquids, temperature is the measure of

Question # 16

Which Statement about gases is not correct?

Question # 17

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

Question # 18

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

Question # 19

Liquids are less common than :

Question # 20

Gases shows uniform behavior toward their :

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

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

Question # 23

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

Question # 24

In solids, the temperature of is the measure of

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

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 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
2 The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS :
A. NH3 >SO2 >CL2 >CO2
B. NH3 >CO2 >SO2 >CL2
C. CL2 >SO2 >CO2 >NH3
D. NH3 >CO2>CL2 >SO2
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 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
5 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
6 For a gas obeying Boyle's law if pressure is doubled, the volume becomes :
A. Remain constant
B. Double
C. One half
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 The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :
A. Charles's law
B. Graham's law
C. Boyle's law
D. Gas law
9 Absolute temperature of a gas is proportional to
A. Rotational kinetic energy
B. Translational kinetic energy
C. Vibrational kinetic energy
D. Potential energy
10 In gases and liquids, temperature is the measure of
A. Average translational kinetic energies of molecules
B. Average vibrational kinetic energies of molecules
C. Average rotational kinetic energies of molecules
D. None of above

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