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

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

Question # 2

Gases exert pressure on walls of container because the gas molecules

Question # 3

All gases can be compressed by

Question # 4

In gases and liquids, temperature is the measure of

Question # 5

Which of the following is the simplest form of matter?

Question # 6

Which statement about gases is not correct ?

Question # 7

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

Question # 8

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

Question # 9

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 10

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

Question # 11

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

Question # 12

The density of a gas is directly and volume at constant temperature for a gas is

Question # 13

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

Question # 14

Keeping the temperature constant, if the gas is expanded

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Gases shows uniform behavior toward their :

Question # 20

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

Question # 21

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

Question # 22

The molar value of CO2 is maximum at :

Question # 23

The rate of diffusion of a gas in

Question # 24

In solids, the temperature of is the measure of

Question # 25

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

Question # 26

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

Question # 27

Boyle's law does not fall even

Question # 28

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

Question # 29

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

Question # 30

The intramolecular force in gases are :

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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

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
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 All gases can be compressed by :
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of the above
5 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
6 The molar value of CO2 is maximum at :
A. STP
B. 127°C and 1 atm
C. 0°C and 2 atm
D. 273°C and 2 atm
7

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

546

B. 200
C. 546K
D. 273K
8 Gases show uniform behaviour towards their
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
9 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
10 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

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