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

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

Question # 2

In solids, the temperature of is the measure of

Question # 3

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 4

Which of the following is the simplest form of matter?

Question # 5

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

Question # 6

Gases exert pressure on walls of container because the gas molecules

Question # 7

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

Question # 8

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

Question # 9

Gases shows uniform behavior toward their :

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

All gases can be compressed by :

Question # 16

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

Question # 17

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

Question # 18

Liquids are less common than :

Question # 19

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

Question # 20

Liquids are less common than

Question # 21

The intramolecular forces in gases are

Question # 22

The rate of diffusion of a gas is :

Question # 23

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

Question # 24

In gases and liquids, temperature is the measure of

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be
A. Remain unchanged
B. Doubled
C. Reduced
D. Increased four times
2 The relationships between volume of a given amount of gas and the prevailing conditions of temperature and pressure are
A. Charle's Law
B. Graham's Law
C. Boyle's Law
D. Gas Laws
3 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
4 Boyle's law does not fall even
A. Temperature is extremely high
B. Pressure is extremely high
C. Mixture of gases is taken
D. all of above
5 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.
6 Cooling happens under the Joule Thomson Effect due to sudden
A. Contraction
B. Absorption
C. Expansion
D. All of above
7 If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of gas will :
A. remain unchanged
B. increase four times
C. reduce to 1/4
D. be doubled
8 Gases of air, always remain in random motion and do not settle due to
A. Difference in molecular masses of air gases
B. Difference in partial pressure of gas molecules
C. Unequal number of different gas molecules
D. Elastic collision of gas molecules
9

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

280 CM3 of CO2 and 280 CM3 of N2O

B.

11.2 dm3 of O2 and 32 g of O2

C.

44 g of CO2 and 11.2 dm3 of CO

D.

28 g of N2 and 5.6 dm3 of oxygen
10 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

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