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

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

Question # 2

Cooling happens under the Joule Thomson Effect due to sudden

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

All gases can be compressed by :

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Gases shows uniform behavior toward their :

Question # 12

In Solids, the temperature is the measure of

Question # 13

The rate of diffusion of a gas in

Question # 14

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

Question # 15

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

Question # 16

Which of the following is the simplest form of matter?

Question # 17

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

Question # 18

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

Question # 19

Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :

Question # 20

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

Question # 21

In gases and liquids, temperature is the measure of

Question # 22

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

Question # 23

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

Question # 24

Gases show uniform behaviour towards their

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Absolute temperature of a gas is proportional to

Question # 29

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

Question # 30

Cooling happens under the Joule Thomson Effect due to sudden :

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ECAT Class Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1

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
2 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
3

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

546

B. 200
C. 546K
D. 273K
4 In gases and liquids, temperature is the measure of :
A. Average transnational kinetic energies of molecules.
B. Average vibrational kinetic energies of molecules.
C. Average rotational kinetic energies of molecules.
D. None of above
5 Equal masses of methane and oxygen are mixed in an empty container at 25°CThe fraction of total pressure exerted by oxygen is :
A. 1/2
B. 8/9
C. 1/9
D. 16/17
6 The movement of molecules from a region of high pressure to vacuum is called :
A. Evaporation
B. Effusion
C. Conduction
D. Difusion
7 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
8 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
9 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
10 According to Boyle's law, which parameters give a straight line parallel to axis-s, when we plot a graph between:
A. V and T
B. P and V
C. P and 1/V
D. P and PV

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