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

Question # 2

The rate of diffusion of a gas is :

Question # 3

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

Question # 4

Cooling happens under the Joule Thomson Effect due to sudden

Question # 5

Which of the following is the simplest form of matter?

Question # 6

Gases show uniform behaviour towards their

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

The density of a gas is directly and volume at constant temperature for a gas is

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

All gases can be compressed by :

Question # 17

The intramolecular forces in gases are

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

Gases shows uniform behavior toward their :

Question # 22

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

Question # 23

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

Question # 24

The rate of diffusion of a gas in

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Boyle's law doesn't fail even :

Question # 29

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

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 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 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
3 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
4 Boyle's law is represented as :
A.

P∞ 1/T

B. V and 1/P
C. P∞P
D. P∞1/P
5 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
6 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
7 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
8

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
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 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.

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