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

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

Question # 2

The rate of diffusion of a gas in

Question # 3

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

Question # 4

Absolute temperature of a gas is proportional to

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 9

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

Question # 10

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

Question # 11

Gases exert pressure on walls of container because the gas molecules

Question # 12

The molar value of CO2 is maximum at :

Question # 13

Boyle's law does not fall even

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Which of the following is the simplest form of matter?

Question # 18

In solids, the temperature of is the measure of

Question # 19

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

Question # 20

Which of the following is the simplest form of matter?

Question # 21

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

Question # 22

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

Question # 23

In gases and liquids, temperature is the measure of :

Question # 24

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

Question # 25

Which Statement about gases is not correct?

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

The intramolecular forces in gases are

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 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.
3 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above
4 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
5 The product of pressure and volume remains constant when temperature and quantity of gas is
A. zero
B. variable
C. kept constant
D. None of these
6 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
7 Keeping the temperature constant, if the gas is expanded
A. kinetic energy of molecules will increase
B. Number of gas molecules increases
C. Temperature will increases
D. Pressure will decrease
8 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
9 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.
10 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above

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