ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

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 deviation of a gas from ideal behavior is maximum at :

Question # 2

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

Question # 3

Boyle's law is represented as :

Question # 4

Which statement about gases is not correct ?

Question # 5

The rate of diffusion of a gas in

Question # 6

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

Question # 7

In solids, the temperature of is the measure of

Question # 8

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 9

Which of the following is the simplest form of matter?

Question # 10

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

Question # 11

In gases and liquids, temperature is the measure of

Question # 12

In gases and liquids, temperature is the measure of :

Question # 13

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

Question # 14

In Solids, the temperature is the measure of

Question # 15

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

Question # 16

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

Question # 17

Keeping the temperature constant, if the gas is expanded

Question # 18

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

Question # 19

Gases show uniform behaviour towards their

Question # 20

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

Question # 21

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

Question # 22

Boyle's law does not fall even

Question # 23

Which of the following is the simplest form of matter?

Question # 24

Which Statement about gases is not correct?

Question # 25

Liquids are less common than :

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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.
2 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be
A. Remain unchanged
B. Doubled
C. Reduced
D. Increased four times
3 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
4 Boyle's law doesn't fail even :
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gas is taken
D. All of above
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 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above
7 The density of a gas is directly and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
8 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
9 All gases can be compressed by
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of above
10 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion

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