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

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

Question # 3

In gases and liquids, temperature is the measure of

Question # 4

Which Statement about gases is not correct?

Question # 5

In Solids, the temperature is the measure of

Question # 6

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

Question # 7

The rate of diffusion of a gas is :

Question # 8

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

Question # 9

Boyle's law doesn't fail even :

Question # 10

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

Question # 11

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

Question # 12

In gases and liquids, temperature is the measure of :

Question # 13

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

Question # 14

All gases can be compressed by :

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

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

Question # 18

A graph between P and PV at constant temperature and number of mole is parallel to

Question # 19

Boyle's law does not fall even

Question # 20

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

Question # 21

Which of the following is the simplest form of matter?

Question # 22

Boyle's law is represented as :

Question # 23

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

Question # 24

Keeping the temperature constant, if the gas is expanded

Question # 25

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

Question # 26

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

Question # 27

The intramolecular forces in gases are

Question # 28

Which of the following is the simplest form of matter?

Question # 29

Which statement about gases is not correct ?

Question # 30

Cooling happens under the Joule Thomson Effect due to sudden :

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Sr.# Question Answer
1 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
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 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above
4 For a gas obeying Boyle's law if pressure is doubled, the volume becomes
A. Remains constant
B. Double
C. One half
D. None of above
5

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
6 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
7 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
8 The ratio of volume to temperature on Kelvin scale is constant according to
A. Charle's law
B. Newton's law
C. Coulomb's law
D. Boyle's law
9 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
10 A graph b/w P and 1/V at constant temperature and number of moles is parallel to :
A. None of above
B. X-axis
C. Z-axis
D. Y-axis

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