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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Absolute temperature of a gas is proportional to

Question # 9

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

Question # 10

The rate of diffusion of a gas is :

Question # 11

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

Question # 12

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

Question # 13

Cooling happens under the Joule Thomson Effect due to sudden

Question # 14

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

Question # 15

Which statement about gases is not correct ?

Question # 16

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

Question # 17

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

Question # 18

The intramolecular force in gases are :

Question # 19

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

Question # 20

In gases and liquids, temperature is the measure of :

Question # 21

Gases shows uniform behavior toward their :

Question # 22

All gases can be compressed by :

Question # 23

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

Question # 24

Gases show uniform behaviour towards their

Question # 25

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

Question # 26

Boyle's law doesn't fail even :

Question # 27

Boyle's law does not fall even

Question # 28

Liquids are less common than :

Question # 29

In solids, the temperature of is the measure of

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above
2 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
3 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.
4 Boyle's law is represented as :
A.

P∞ 1/T

B. V and 1/P
C. P∞P
D. P∞1/P
5 Gases exert pressure on walls of container because the gas molecules
A. Obey gas laws
B. Have definite volume
C. Collide with the walls of container
D. Collide with each other
6 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
7 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
8 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
9 The intramolecular forces in gases are
A. Weak
B. Normal
C. Very weak
D. Strong
10 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

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