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

Which of the following is the simplest form of matter?

Question # 2

Boyle's law does not fall even

Question # 3

Liquids are less common than

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

In Solids, the temperature is the measure of

Question # 8

Which statement about gases is not correct ?

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

In solids, the temperature of is the measure of

Question # 13

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

Question # 14

The molar value of CO2 is maximum at :

Question # 15

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

Question # 16

In gases and liquids, temperature is the measure of

Question # 17

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

Question # 18

The rate of diffusion of a gas in

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

Keeping the temperature constant, if the gas is expanded

Question # 23

Cooling happens under the Joule Thomson Effect due to sudden

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

Gases show uniform behaviour towards their

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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 In Solids, the temperature is the measure of
A. Rotational kinetic energies
B. Translational kinetic energies
C. Vibrational kinetic energies
D. None of above
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 The intramolecular forces in gases are
A. Weak
B. Normal
C. Very weak
D. Strong
5 All gases can be compressed by :
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of the above
6 Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :
A. 1/2
B. 8/9
C. 1/9
D. 16/17
7 At constant temperature when pressure of a gas is plotted against volume, the curve is
A. Slanting straight line
B. Parabolic
C. Staight line, parallel to pressure axis
D. OF neither type
8 The product of pressure and volume remains constant when temperature and quantity of gas is
A. zero
B. variable
C. kept constant
D. None of these
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 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.

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