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 statement about gases is not correct ?

Question # 2

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

Question # 3

Gases shows uniform behavior toward their :

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Liquids are less common than

Question # 9

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

Question # 10

The molar value of CO2 is maximum at :

Question # 11

Cooling happens under the Joule Thomson Effect due to sudden

Question # 12

Keeping the temperature constant, if the gas is expanded

Question # 13

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

Question # 14

The intramolecular force in gases are :

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

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 graph between pressure and volume at constant temperature for a gas is

Question # 21

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

Question # 22

Which Statement about gases is not correct?

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Liquids are less common than :

Question # 28

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

Question # 29

All gases can be compressed by :

Question # 30

In solids, the temperature of is the measure of

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 A graph between P and PV at constant temperature and number of mole is parallel to
A. y axis
B. z axis
C. x axis
D. pressure axis
2 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
3 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
4 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
5 The intramolecular force in gases are :
A. Weak
B. Normal
C. Very weak
D. Strong
6

How should condition be changed to prevent the volume of a given gas from expanding whine its mass is increased ?
A. Temperature is lowered and pressure is increased
B. Temperature is increasedand pressure is lowered
C. Temperature and pressure both are lowered
D. Temperature and pressure both are increased
7 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above
8

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

546

B. 200
C. 546K
D. 273K
9 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
10 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

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