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

Question # 2

Boyle's law does not fall even

Question # 3

Boyle's law is represented as :

Question # 4

The rate of diffusion of a gas is :

Question # 5

Cooling happens under the Joule Thomson Effect due to sudden :

Question # 6

Liquids are less common than :

Question # 7

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

Question # 8

The intramolecular forces in gases are

Question # 9

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

Question # 10

Which of the following is the simplest form of matter?

Question # 11

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

Question # 12

Absolute temperature of a gas is proportional to

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

The molar value of CO2 is maximum at :

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

Which of the following is the simplest form of matter?

Question # 24

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

Question # 25

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

Question # 26

In gases and liquids, temperature is the measure of

Question # 27

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

Question # 28

Which statement about gases is not correct ?

Question # 29

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

Question # 30

Which Statement about gases is not correct?

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Gases exert pressure on walls of container because the gas molecules :
A. Obey gas laws.
B. Have definite volume.
C. Collide with the walls of container.
D. Collide with each other.
2 A real gas obeying van der Waals' equation will resemble ideal gas if :
A. both 'a' and 'b' are large
B. both 'a' and 'b' are small
C. 'a' is small and 'b' is large
D. 'a' is large and 'b' is small
3 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
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 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
6

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
7 Keeping the temperature constant, if the gas is expanded
A. kinetic energy of molecules will increase
B. Number of gas molecules increases
C. Temperature will increases
D. Pressure will decrease
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 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
10 Liquids are less common than
A. Solids
B. Plasmas
C. Gases
D. All of above

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