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

Liquids are less common than :

Question # 2

Cooling happens under the Joule Thomson Effect due to sudden

Question # 3

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

Question # 4

Keeping the temperature constant, if the gas is expanded

Question # 5

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

Question # 6

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

Question # 7

Liquids are less common than

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Which of the following is the simplest form of matter?

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

In Solids, the temperature is the measure of

Question # 19

Boyle's law doesn't fail even :

Question # 20

The product of pressure and volume remains constant when temperature and quantity of gas is

Question # 21

Gases show uniform behaviour towards their

Question # 22

In gases and liquids, temperature is the measure of

Question # 23

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

Question # 24

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

Question # 25

The intramolecular forces in gases are

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

Boyle's law is represented as :

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Absolute temperature of a gas is proportional to
A. Rotational kinetic energy
B. Translational kinetic energy
C. Vibrational kinetic energy
D. Potential energy
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 Which Statement about gases is not correct?
A. They spread throughout the vessel
B. Pressure is due to collision
C. There are larger spaces between the molecules
D. Molecules are arranged regularly
4 The rate of diffusion of a gas is :
A. Inversely proportional to its density
B. Inversely proportional to square root of its molecular mass
C. Directly proportional to molecular mass
D. Directly proportional to its density
5 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.
6 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
7 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
8 For a gas obeying Boyle's law if pressure is doubled, the volume becomes :
A. Remain constant
B. Double
C. One half
D. None of above
9

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?
A. Temperature is lowered and pressure is increased
B. Temperature is increasedand pressure is lowered
C. Temperature and pressure both are lowered
D. Temperature and pressure both are increased
10 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

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