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

00:00
Question # 1

All gases can be compressed by :

Question # 2

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

Question # 3

In Solids, the temperature is the measure of

Question # 4

In gases and liquids, temperature is the measure of

Question # 5

Which statement about gases is not correct ?

Question # 6

Boyle's law does not fall even

Question # 7

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

Question # 8

Liquids are less common than :

Question # 9

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

Question # 10

In solids, the temperature of is the measure of

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

Keeping the temperature constant, if the gas is expanded

Question # 15

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

Question # 16

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

Question # 17

Boyle's law doesn't fail even :

Question # 18

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

Question # 19

The rate of diffusion of a gas is :

Question # 20

The intramolecular force in gases are :

Question # 21

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

Question # 22

The rate of diffusion of a gas in

Question # 23

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

Question # 24

The intramolecular forces in gases are

Question # 25

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

Question # 26

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 27

In gases and liquids, temperature is the measure of :

Question # 28

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

Question # 29

Which of the following is the simplest form of matter?

Question # 30

All gases can be compressed by

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 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
2 The molar value of CO2 is maximum at :
A. STP
B. 127°C and 1 atm
C. 0°C and 2 atm
D. 273°C and 2 atm
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

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
5

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
6 Gases shows uniform behavior toward their :
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
7 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
8 The rate of diffusion of a gas is :
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
9 Gases deviate from ideal behavior at high pressure. Which of the following is correct for non-ideality ?
A. At high pressure, the gas molecules move in one direction only.
B. At high pressure, the collisions between the gas molecules are increased manifold.
C. At high pressure, the volume of gas becomes insignificant.
D. At high pressure, the inter molecular attraction become significant.
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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