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

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

Question # 2

For a gas obeying Boyle's law if pressure is doubled, the volume becomes :

Question # 3

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

Question # 4

Gases show uniform behaviour towards their

Question # 5

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

Question # 6

Liquids are less common than

Question # 7

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

Question # 8

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

Question # 9

Which statement about gases is not correct ?

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Gases shows uniform behavior toward their :

Question # 14

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

Question # 15

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

Question # 16

Keeping the temperature constant, if the gas is expanded

Question # 17

All gases can be compressed by :

Question # 18

Boyle's law does not fall even

Question # 19

In Solids, the temperature is the measure of

Question # 20

In gases and liquids, temperature is the measure of :

Question # 21

Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?

Question # 22

For a gas obeying Boyle's law if pressure is doubled, the volume becomes

Question # 23

The intramolecular forces in gases are

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

The rate of diffusion of a gas is :

Question # 29

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

Question # 30

Liquids are less common than :

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ECAT Class Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 All gases can be compressed by
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of above
2 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
3 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
4

Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid state
C. Solid state
D. All of above
5 The highest temperature at which a substance can exist as a liquid is called its
A. Critical temperature
B. Zero temperature
C. Absolute temperature
D. None of above
6 Boyle's law is represented as :
A.

P∞ 1/T

B. V and 1/P
C. P∞P
D. P∞1/P
7 The intramolecular force in gases are :
A. Weak
B. Normal
C. Very weak
D. Strong
8 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
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 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion

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