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

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

Question # 2

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

Question # 3

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

Question # 4

The rate of diffusion of a gas in

Question # 5

The intramolecular force in gases are :

Question # 6

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

Question # 7

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

Question # 8

In gases and liquids, temperature is the measure of

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Gases show uniform behaviour towards their

Question # 13

Boyle's law doesn't fail even :

Question # 14

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

Question # 15

Which of the following is the simplest form of matter?

Question # 16

Boyle's law is represented as :

Question # 17

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

Question # 18

Liquids are less common than

Question # 19

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

Question # 20

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

Question # 21

In gases and liquids, temperature is the measure of :

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

Which Statement about gases is not correct?

Question # 26

Boyle's law does not fall even

Question # 27

A graph b/w P and 1/V at constant temperature and number of moles is parallel to :

Question # 28

Which of the following is the simplest form of matter?

Question # 29

The intramolecular forces in gases are

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 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.
3 All gases can be compressed by :
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of the above
4 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
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 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
7 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
8 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
9 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
10 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

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