ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

Question # 1

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

Charle's Law A
Graham's Law B
Boyle's Law C
Gas Laws D

Question # 2

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 # 3

The intramolecular forces in gases are

Weak A
Normal B
Very weak C
Strong D

Question # 4

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 # 5

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 # 6

Liquids are less common than :

Solids A
Plasmas B
Gases C
All of above 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

Cooling happens under the Joule Thomson Effect due to sudden

Contraction A
Absorption B
Expansion C
All of above D

Question # 9

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

Evaportation A
Effusion B
Conduction C
Diffusion D

Question # 10

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 # 11

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 # 12

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

Charle's law A
Newton's law B
Coulomb's law C
Boyle's law D

Question # 13

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 # 14

Which of the following is the simplest form of matter?

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

Question # 15

The highest temperature at which a substance can exist as a liquid is called its

Critical temperature A
Zero temperature B
Absolute temperature C
None of above D

Question # 16

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

At high pressure, the gas molecules move in one direction only. A
At high pressure, the collisions between the gas molecules are increased manifold. B
At high pressure, the volume of gas becomes insignificant. C
At high pressure, the inter molecular attraction become significant. D

Question # 17

Which of the following is the simplest form of matter?

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

Question # 18

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 # 19

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 # 20

Boyle's law does not fall even

Temperature is extremely high A
Pressure is extremely high B
Mixture of gases is taken C
all of above D

Question # 21

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 # 22

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 # 23

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

Temperature and quality of a gas. A
Pressure and quality of a gas. B
Temperature and pressure C
Temperature and quantity of a gas. D

Question # 24

Liquids are less common than

Solids A
Plasmas B
Gases C
All of above D

Question # 25

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

546
A
200 B
546K C
273K D

Question # 26

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

Remain unchanged A
Doubled B
Reduced C
Increased four times D

Question # 27

Keeping the temperature constant, if the gas is expanded

kinetic energy of molecules will increase A
Number of gas molecules increases B
Temperature will increases C
Pressure will decrease D

Question # 28

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 # 29

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

None of above A
X-axis B
Z-axis C
Y-axis D

Question # 30

In Solids, the temperature is the measure of

Rotational kinetic energies A
Translational kinetic energies B
Vibrational kinetic energies C
None of above D

Sr.#	Question	Answer
1	Liquids are less common than :	A. Solids B. Plasmas C. Gases D. All of above
2	Which Statement about gases is not correct?	A. They spread throughout the vessel B. Pressure is due to collision C. There are larger spaces between the molecules D. Molecules are arranged regularly
3	Gases of air, always remain in random motion and do not settle due to	A. Difference in molecular masses of air gases B. Difference in partial pressure of gas molecules C. Unequal number of different gas molecules D. Elastic collision of gas molecules
4	The intramolecular forces in gases are	A. Weak B. Normal C. Very weak D. Strong
5	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
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	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	If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will be	A. Remain unchanged B. Doubled C. Reduced D. Increased four times
9	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
10	The movement of molecules from a region of high pressure to vacuum is called :	A. Evaporation B. Effusion C. Conduction D. Difusion

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 3 Gases

ECAT Chemistry Chapter 3 Gases

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

In gases and liquids, temperature is the measure of :

The intramolecular forces in gases are

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

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

Liquids are less common than :

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

Cooling happens under the Joule Thomson Effect due to sudden

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

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

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

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

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

Which of the following is the simplest form of matter?

The highest temperature at which a substance can exist as a liquid is called its

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

Which of the following is the simplest form of matter?

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 :

Boyle's law does not fall even

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

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

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

Liquids are less common than

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

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

Keeping the temperature constant, if the gas is expanded

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

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

In Solids, the temperature is the measure of

Prepare Complete Set Wise ECAT Chemistry Chapter 3 Gases MCQs Online With Answers

Set 1

Set 2

Set 3

Topic Test

Top Scorers Of ECAT Chemistry Chapter 3 Gases MCQ`s Test

ECAT Chemistry Chapter 3 Important MCQ's

Test Questions

Share your comments & questions here

ahsan

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