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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

All gases can be compressed by

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The intramolecular force in gases are :

Question # 13

Which of the following is the simplest form of matter?

Question # 14

Cooling happens under the Joule Thomson Effect due to sudden

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Boyle's law is represented as :

Question # 20

In Solids, the temperature is the measure of

Question # 21

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

Question # 22

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

Question # 23

Gases shows uniform behavior toward their :

Question # 24

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

Question # 25

Gases exert pressure on walls of container because the gas molecules :

Question # 26

Liquids are less common than

Question # 27

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

Question # 28

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

Question # 29

The intramolecular forces in gases are

Question # 30

Which statement about gases is not correct ?

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 A graph between P and 1/V at constant temperature and number moles of a gas meets the
A. y-axis
B. x-axis
C. origin
D. none of above
2 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
3 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
4 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
5 The rate of diffusion of a gas in
A. Inversely proportional to its density
B. Inversely proportional to square root of its molecular mass
C. Directly proportional to molecular mass
D. Directly proportional to its density
6 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.
7 A real gas obeying van der Waals' equation will resemble ideal gas if :
A. both 'a' and 'b' are large
B. both 'a' and 'b' are small
C. 'a' is small and 'b' is large
D. 'a' is large and 'b' is small
8 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.
9

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

6.02/22.4


B.

12.04/22.4 *1023


C.

18/22.4*1023

D.

55.6*6.02*1023 * 1023
10

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

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    ahsan

    20 Jul 2019

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