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

Liquids are less common than :

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Which Statement about gases is not correct?

Question # 7

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

Question # 8

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

Question # 9

Boyle's law doesn't fail even :

Question # 10

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

Question # 11

Which of the following is the simplest form of matter?

Question # 12

In solids, the temperature of is the measure of

Question # 13

Gases exert pressure on walls of container because the gas molecules

Question # 14

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

Question # 15

The rate of diffusion of a gas in

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 remains constant

Question # 18

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

Question # 19

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

Question # 20

In gases and liquids, temperature is the measure of :

Question # 21

The intramolecular forces in gases are

Question # 22

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

Question # 23

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

Question # 24

All gases can be compressed by

Question # 25

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

Question # 26

Boyle's law does not fall even

Question # 27

Gases show uniform behaviour towards their

Question # 28

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 29

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

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 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.
2 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
3 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above
4 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.
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 Which Statement about gases is not correct?
A. They spread throughout the vessel
B. Pressure is due to collision
C. There are larger spaces between the molecules
D. Molecules are arranged regularly
7 The ratio of volume to temperature on Kelvin scale is constant according to
A. Charle's law
B. Newton's law
C. Coulomb's law
D. Boyle's law
8 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
9 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
10 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

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