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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

At constant temperature when pressure of a gas is plotted against volume, the curve is

Question # 6

All gases can be compressed by :

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

In Solids, the temperature is the measure of

Question # 13

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

Question # 14

In solids, the temperature of is the measure of

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Boyle's law does not fall even

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

Which of the following is the simplest form of matter?

Question # 24

Absolute temperature of a gas is proportional to

Question # 25

Boyle's law is represented as :

Question # 26

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

Question # 27

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

Question # 28

Which of the following is the simplest form of matter?

Question # 29

The rate of diffusion of a gas is :

Question # 30

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

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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 relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :
A. Charles's law
B. Graham's law
C. Boyle's law
D. Gas law
3 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. Y-axis
B. Z-axis
C. X-axis
D. None of above
4

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
5 All gases can be compressed by :
A. Keeping constant pressure
B. Decreasing pressure
C. Increasing pressure
D. None of the above
6 Boyle's law doesn't fail even :
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gas is taken
D. All of above
7 Gases show uniform behaviour towards their
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
8 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
9 The order of the rate of diffusion of gases NH3,SO2, CL2, and CO2 IS :
A. NH3 >SO2 >CL2 >CO2
B. NH3 >CO2 >SO2 >CL2
C. CL2 >SO2 >CO2 >NH3
D. NH3 >CO2>CL2 >SO2
10 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

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