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

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

Question # 2

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

Question # 3

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

Question # 4

Boyle's law does not fall even

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Which Statement about gases is not correct?

Question # 9

In Solids, the temperature is the measure of

Question # 10

The molar value of CO2 is maximum at :

Question # 11

Which of the following is the simplest form of matter?

Question # 12

In gases and liquids, temperature is the measure of

Question # 13

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

Question # 14

Gases show uniform behaviour towards their

Question # 15

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

Question # 16

Gases exert pressure on walls of container because the gas molecules

Question # 17

The intramolecular force in gases are :

Question # 18

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

Question # 19

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

Question # 20

Gases shows uniform behavior toward their :

Question # 21

Liquids are less common than :

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

All gases can be compressed by :

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above
3 The molar value of CO2 is maximum at :
A. STP
B. 127°C and 1 atm
C. 0°C and 2 atm
D. 273°C and 2 atm
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 The rate of diffusion of a gas in
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 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 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.
8 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
9 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
10 According to Boyle's law. which parameters give a straight line parallel to x-axis, when we plot a graph between
A. V and T
B. P and V
C. P and 1/V
D. P and PV

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