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

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

Question # 2

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

Question # 3

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

Question # 4

Which Statement about gases is not correct?

Question # 5

The rate of diffusion of a gas in

Question # 6

Gases shows uniform behavior toward their :

Question # 7

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

Question # 8

Liquids are less common than

Question # 9

The molar value of CO2 is maximum at :

Question # 10

All gases can be compressed by

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The product of pressure and volume remains constant when temperature and quantity of gas is

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

Absolute temperature of a gas is proportional to

Question # 21

Boyle's law is represented as :

Question # 22

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

Question # 23

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

Question # 24

In solids, the temperature of is the measure of

Question # 25

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

Question # 26

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

Question # 27

Which of the following is the simplest form of matter?

Question # 28

Boyle's law doesn't fail even :

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Gases show uniform behaviour towards their
A. Internal conditions
B. External conditions
C. Internal and external conditions
D. None of above
2 The density of a gas is directly and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
3 The graph between pressure and volume at constant temperature for a gas is
A. Isobaric
B. Isothermal
C. Isotherm
D. None of above
4 According to Boyle's law. which parameters give a straight line parallel to x-axis, when we plot a graph between
A. V and T
B. P and V
C. P and 1/V
D. P and PV
5 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.
6 The highest temperature at which a substance can exist as a liquid is called its
A. Critical temperature
B. Zero temperature
C. Absolute temperature
D. None of above
7

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
8

Which of the following is the simplest form of matter?
A. Gaseous state
B. Liquid state
C. Solid state
D. All of above
9 The product of pressure and volume remains constant when temperature and quantity of gas is
A. zero
B. variable
C. kept constant
D. None of these
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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