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 gases and liquids, temperature is the measure of

Question # 2

The molar value of CO2 is maximum at :

Question # 3

In solids, the temperature of is the measure of

Question # 4

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

Question # 5

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

Question # 6

Boyle's law doesn't fail even :

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

Cooling happens under the Joule Thomson Effect due to sudden

Question # 10

Boyle's law is represented as :

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Liquids are less common than

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

The rate of diffusion of a gas in

Question # 23

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

Question # 24

Which of the following is the simplest form of matter?

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Gases exert pressure on walls of container because the gas molecules

Question # 29

The rate of diffusion of a gas is :

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:
A. V and T
B. P and V
C. P and 1/V
D. P and PV
2 In gases and liquids, temperature is the measure of
A. Average translational kinetic energies of molecules
B. Average vibrational kinetic energies of molecules
C. Average rotational kinetic energies of molecules
D. None of above
3 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
4 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.
5 The graph between pressure and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
6 Gases show uniform behaviour towards their
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
7 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
8 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
9 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
10 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

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