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

Question # 2

In gases and liquids, temperature is the measure of :

Question # 3

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

Question # 4

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

Question # 5

Which of the following is the simplest form of matter?

Question # 6

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

Question # 7

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

Question # 8

The intramolecular force in gases are :

Question # 9

The intramolecular forces in gases are

Question # 10

The rate of diffusion of a gas is :

Question # 11

All gases can be compressed by :

Question # 12

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

Question # 13

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

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

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

Question # 16

In Solids, the temperature is the measure of

Question # 17

All gases can be compressed by

Question # 18

Gases exert pressure on walls of container because the gas molecules

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

The molar value of CO2 is maximum at :

Question # 24

Liquids are less common than :

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

In gases and liquids, temperature is the measure of

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
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 A graph between P and PV at constant temperature and number of mole is parallel to
A. y axis
B. z axis
C. x axis
D. pressure axis
4 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
5 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
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 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 A real gas obeying van der Waals' equation will resemble ideal gas if :
A. both 'a' and 'b' are large
B. both 'a' and 'b' are small
C. 'a' is small and 'b' is large
D. 'a' is large and 'b' is small
9 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
10 Which statement about gases is not correct ?
A. The spread throughout the vessel.
B. Pressure is due to collision
C. There are large spaces between the molecules.
D. molecules are arranged regularly.

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