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

Which Statement about gases is not correct?

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The intramolecular forces in gases are

Question # 6

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

Question # 7

Keeping the temperature constant, if the gas is expanded

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Gases shows uniform behavior toward their :

Question # 12

Liquids are less common than :

Question # 13

In gases and liquids, temperature is the measure of

Question # 14

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

Question # 15

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

Question # 16

Which of the following is the simplest form of matter?

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Boyle's law doesn't fail even :

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

Cooling happens under the Joule Thomson Effect due to sudden

Question # 29

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

Question # 30

The rate of diffusion of a gas is :

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ECAT Chemistry Chapter 3 Important MCQ's

Sr.# Question Answer
1 Cooling happens under the Joule Thomson Effect due to sudden :
A. Contraction
B. Absortption
C. Expansion
D. All of above
2 The relation ships b/w volume of given amount of gas and prevailing conditions of temperature and pressure are :
A. Charles's law
B. Graham's law
C. Boyle's law
D. Gas law
3 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
4 The movement of gas molecules from a region of high pressure to vacuum is called
A. Evaportation
B. Effusion
C. Conduction
D. Diffusion
5 In solids, the temperature of is the measure of
A. Rotational kinetic energies
B. transnational kineticenergies
C. Vibrationalkineticenergies
D. None of the above
6 In Boyle's law which of the following pair remains constant :
A. Temperature and quality of a gas.
B. Pressure and quality of a gas.
C. Temperature and pressure
D. Temperature and quantity of a gas.
7 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
8 The intramolecular force in gases are :
A. Weak
B. Normal
C. Very weak
D. Strong
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 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

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