ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

Question # 1

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

Temperature and quantity of a gas A
Pressure and Volume B
Volume and quantity of a gas C
Pressure and quantity of a gas D

Question # 2

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

Isobaric A
Isothermal B
Isotherm C
None of above D

Question # 3

All gases can be compressed by

Keeping constant pressure A
Decreasing pressure B
Increasing pressure C
None of above D

Question # 4

Which of the following is the simplest form of matter?

Gaseous state A
Liquid State B
Solid State C
All of above D

Question # 5

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

y axis A
z axis B
x axis C
pressure axis D

Question # 6

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

V and T A
P and V B
P and 1/V C
P and PV D

Question # 7

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

1/2 A
8/9 B
1/9 C
16/17 D

Question # 8

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

Difference in molecular masses of air gases. A
Difference in partial pressure of gas molecules. B
Unequal number of different gas molecules. C
Elastic collision of gas molecules. D

Question # 9

Gases exert pressure on walls of container because the gas molecules

Obey gas laws A
Have definite volume B
Collide with the walls of container C
Collide with each other D

Question # 10

In gases and liquids, temperature is the measure of

Average translational kinetic energies of molecules A
Average vibrational kinetic energies of molecules B
Average rotational kinetic energies of molecules C
None of above D

Question # 11

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

NH_{3 >}SO_{2 >}CL_{2 >}CO₂ A
NH_{3 >}CO_{2 >}SO_{2 >}CL₂ B
CL_{2 >}SO_{2 >}CO_{2 >}NH₃ C
NH_{3 >}CO₂_>CL_{2 >}SO₂ D

Question # 12

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

Slanting straight line A
Parabolic B
Staight line, parallel to pressure axis C
OF neither type D

Question # 13

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

Temperature and quantity of a gas. A
Pressure and volume B
Volume and quantity of a gas. C
Pressure and quantity of a gas. D

Question # 14

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

remain unchanged A
increase four times B
reduce to 1/4 C
be doubled D

Question # 15

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

Evaportation A
Effusion B
Conduction C
Diffusion D

Question # 16

Absolute temperature of a gas is proportional to

Rotational kinetic energy A
Translational kinetic energy B
Vibrational kinetic energy C
Potential energy D

Question # 17

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

-10°C and 5.0 atm A
-10°C and 2.0 atm B
100°C and 2.0 atm C
0°C and 2.0 atm D

Question # 18

Cooling happens under the Joule Thomson Effect due to sudden :

Contraction A
Absortption B
Expansion C
All of above D

Question # 19

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

Temperature is lowered and pressure is increased A
Temperature is increasedand pressure is lowered B
Temperature and pressure both are lowered C
Temperature and pressure both are increased D

Question # 20

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

remain unchanged A
increase four times B
reduce to 1/4 C
be doubled D

Question # 21

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

Obey gas laws. A
Have definite volume. B
Collide with the walls of container. C
Collide with each other. D

Question # 22

Which of the following is the simplest form of matter?

Gaseous state A
Liquid state B
Solid state C
All of above D

Question # 23

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

Viscosity A
Molar mass B
Momentum C
All of above D

Question # 24

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

zero A
variable B
kept constant C
None of these D

Question # 25

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

Charles's law A
Graham's law B
Boyle's law C
Gas law D

Question # 26

The intramolecular force in gases are :

Weak A
Normal B
Very weak C
Strong D

Question # 27

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

Remains constant A
Double B
One half C
None of above D

Question # 28

In gases and liquids, temperature is the measure of :

Average transnational kinetic energies of molecules. A
Average vibrational kinetic energies of molecules. B
Average rotational kinetic energies of molecules. C
None of above D

Question # 29

Cooling happens under the Joule Thomson Effect due to sudden

Contraction A
Absorption B
Expansion C
All of above D

Question # 30

The rate of diffusion of a gas is :

Inversely proportional to its density A
Inversely proportional to square root of its molecular mass B
Directly proportional to molecular mass C
Directly proportional to its density D

Sr.#	Question	Answer
1	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.
2	The order of the rate of diffusion of gases NH₃,SO₂, CL₂, and CO₂ IS :	A. NH_{3 >}SO_{2 >}CL_{2 >}CO₂ B. NH_{3 >}CO_{2 >}SO_{2 >}CL₂ C. CL_{2 >}SO_{2 >}CO_{2 >}NH₃ D. NH_{3 >}CO₂_>CL_{2 >}SO₂
3	In solids, the temperature of is the measure of	A. Rotational kinetic energies B. transnational kineticenergies C. Vibrationalkineticenergies D. None of the 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 is the simplest form of matter?	A. Gaseous state B. Liquid State C. Solid State D. All of above
6	The deviation of a gas from ideal behavior is maximum at :	A. -10°C and 5.0 atm B. -10°C and 2.0 atm C. 100°C and 2.0 atm D. 0°C and 2.0 atm
7	A graph between P and PV at constant temperature and number of mole is parallel to	A. y axis B. z axis C. x axis D. pressure axis
8	The rate of diffusion of a gas is :	A. Inversely proportional to its density B. Inversely proportional to square root of its molecular mass C. Directly proportional to molecular mass D. Directly proportional to its density
9	All gases can be compressed by	A. Keeping constant pressure B. Decreasing pressure C. Increasing pressure D. None of above
10	The intramolecular forces in gases are	A. Weak B. Normal C. Very weak D. Strong

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ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 3 Gases

ECAT Chemistry Chapter 3 Gases

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

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

All gases can be compressed by

Which of the following is the simplest form of matter?

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

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

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

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

Gases exert pressure on walls of container because the gas molecules

In gases and liquids, temperature is the measure of

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

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

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

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

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

Absolute temperature of a gas is proportional to

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

Cooling happens under the Joule Thomson Effect due to sudden :

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

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

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

Which of the following is the simplest form of matter?

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

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

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

The intramolecular force in gases are :

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

In gases and liquids, temperature is the measure of :

Cooling happens under the Joule Thomson Effect due to sudden

The rate of diffusion of a gas is :

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Test Questions

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