ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

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

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

Question # 3

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

Question # 4

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

Question # 5

The intramolecular force in gases are :

Question # 6

In Solids, the temperature is the measure of

Question # 7

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

Question # 8

The intramolecular forces in gases are

Question # 9

The rate of diffusion of a gas in

Question # 10

In gases and liquids, temperature is the measure of

Question # 11

Boyle's law doesn't fail even :

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Boyle's law is represented as :

Question # 16

Gases show uniform behaviour towards their

Question # 17

All gases can be compressed by :

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

Which of the following is the simplest form of matter?

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

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

Question # 25

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

Question # 26

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

Question # 27

Gases exert pressure on walls of container because the gas molecules

Question # 28

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

Question # 29

In solids, the temperature of is the measure of

Question # 30

Liquids are less common than :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 The graph between pressure and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
2 The density of a gas is directly proportional to pressure, inversely proportional to temperature and directly proportional to
A. Viscosity
B. Molar mass
C. Momentum
D. All of above
3 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
4 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
5

Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid state
C. Solid state
D. All of above
6 For a gas obeying Boyle's law if pressure is doubled, the volume becomes :
A. Remain constant
B. Double
C. One half
D. None of above
7 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.
8 Boyle's law does not fall even
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gases is taken
D. all of above
9 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
10 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

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