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 remains constant :

Question # 2

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

Question # 3

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

Question # 4

Absolute temperature of a gas is proportional to

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

All gases can be compressed by :

Question # 9

Boyle's law does not fall even

Question # 10

Boyle's law is represented as :

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

In gases and liquids, temperature is the measure of

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

Which statement about gases is not correct ?

Question # 22

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

Question # 23

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

Question # 24

Keeping the temperature constant, if the gas is expanded

Question # 25

The intramolecular force in gases are :

Question # 26

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

Question # 27

Boyle's law doesn't fail even :

Question # 28

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

Question # 29

The rate of diffusion of a gas is :

Question # 30

Liquids are less common than :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 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
4 Boyle's law is represented as :
A.

P∞ 1/T

B. V and 1/P
C. P∞P
D. P∞1/P
5 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :
A. remain unchanged
B. increase four times
C. reduce to 1/4
D. be doubled
6 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.
7 Keeping the temperature constant, if the gas is expanded
A. kinetic energy of molecules will increase
B. Number of gas molecules increases
C. Temperature will increases
D. Pressure will decrease
8 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.
9 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
10 Gases shows uniform behavior toward their :
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above

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