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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

Liquids are less common than

Question # 8

Cooling happens under the Joule Thomson Effect due to sudden

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Which Statement about gases is not correct?

Question # 13

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

Question # 14

Absolute temperature of a gas is proportional to

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Which statement about gases is not correct ?

Question # 20

The molar value of CO2 is maximum at :

Question # 21

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

Question # 22

All gases can be compressed by

Question # 23

The intramolecular force in gases are :

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Keeping the temperature constant, if the gas is expanded

Question # 30

Which of the following is the simplest form of matter?

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 For a gas obeying Boyle's law if pressure is doubled, the volume becomes
A. Remains constant
B. Double
C. One half
D. None of above
2 Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :
A. 1/2
B. 8/9
C. 1/9
D. 16/17
3 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
4 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
5 In gases and liquids, temperature is the measure of :
A. Average transnational kinetic energies of molecules.
B. Average vibrational kinetic energies of molecules.
C. Average rotational kinetic energies of molecules.
D. None of above
6 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
7 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
8 Gases shows uniform behavior toward their :
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
9 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. None of above
B. X-axis
C. Z-axis
D. Y-axis
10 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above

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