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

Boyle's law doesn't fail even :

Question # 2

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

Question # 3

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

Question # 4

Boyle's law does not fall even

Question # 5

The molar value of CO2 is maximum at :

Question # 6

All gases can be compressed by

Question # 7

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

Question # 8

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

Question # 9

In Solids, the temperature is the measure of

Question # 10

All gases can be compressed by :

Question # 11

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

Question # 12

Which Statement about gases is not correct?

Question # 13

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

Question # 14

Which of the following is the simplest form of matter?

Question # 15

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

Question # 16

The rate of diffusion of a gas is :

Question # 17

Cooling happens under the Joule Thomson Effect due to sudden

Question # 18

In solids, the temperature of is the measure of

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Absolute temperature of a gas is proportional to

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
2 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.
3

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

6.02/22.4


B.

12.04/22.4 *1023


C.

18/22.4*1023

D.

55.6*6.02*1023 * 1023
4 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. Y-axis
B. Z-axis
C. X-axis
D. None of above
5 Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?
A. At high pressure, the gas molecules move in one direction only.
B. At high pressure, the collisions between the gas molecules are increased manifold.
C. At high pressure, the volume of gas becomes insignificant.
D. At high pressure, the inter molecular attraction become significant.
6 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
7 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
8 In Boyle's law which of the following pair is variable
A. Temperature and quantity of a gas
B. Pressure and Volume
C. Volume and quantity of a gas
D. Pressure and quantity of a gas
9 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
10 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

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