ECAT Pre Engineering Chemistry Chapter 3 MCQ Test With Answer

Question # 1

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 # 2

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

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

Question # 3

In Solids, the temperature is the measure of

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

Question # 4

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

Isobaric A
Isothermal B
Isotherm C
None of above D

Question # 5

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

Question # 6

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 # 7

Cooling happens under the Joule Thomson Effect due to sudden :

Contraction A
Absortption B
Expansion C
All of above D

Question # 8

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 # 9

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 # 10

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 # 11

Which of the following is the simplest form of matter?

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

Question # 12

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 # 13

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 # 14

Cooling happens under the Joule Thomson Effect due to sudden

Contraction A
Absorption B
Expansion C
All of above D

Question # 15

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 # 16

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

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

Question # 17

Liquids are less common than

Solids A
Plasmas B
Gases C
All of above D

Question # 18

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 # 19

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 # 20

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 # 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

The molar value of CO₂is maximum at :

STP A
127°C and 1 atm B
0°C and 2 atm C
273°C and 2 atm D

Question # 23

In solids, the temperature of is the measure of

Rotational kinetic energies A
transnational kineticenergies B
Vibrationalkineticenergies C
None of the above D

Question # 24

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 # 25

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

Evaportation A
Effusion B
Conduction C
Diffusion D

Question # 26

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 # 27

Which Statement about gases is not correct?

They spread throughout the vessel A
Pressure is due to collision B
There are larger spaces between the molecules C
Molecules are arranged regularly D

Question # 28

Boyle's law is represented as :

P∞ 1/T
A
V and 1/P B
P∞P C
P∞1/P D

Question # 29

Which of the following is the simplest form of matter?

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

Question # 30

The intramolecular force in gases are :

Weak A
Normal B
Very weak C
Strong D

Sr.#	Question	Answer
1	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
2	In solids, the temperature of is the measure of	A. Rotational kinetic energies B. transnational kineticenergies C. Vibrationalkineticenergies D. None of the above
3	The intramolecular force in gases are :	A. Weak B. Normal C. Very weak D. Strong
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	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
6	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
7	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
8	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.
9	Which statement about gases is not correct ?	A. The spread throughout the vessel. B. Pressure is due to collision C. There are large spaces between the molecules. D. molecules are arranged regularly.
10	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

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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 gases and liquids, temperature is the measure of

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

In Solids, the temperature is the measure of

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

The rate of diffusion of a gas is :

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

Cooling happens under the Joule Thomson Effect due to sudden :

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

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

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?

Keeping the temperature constant, if the gas is expanded

Gases exert pressure on walls of container because the gas molecules

Cooling happens under the Joule Thomson Effect due to sudden

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

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

Liquids are less common than

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

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

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

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

The molar value of CO2 is maximum at :

In solids, the temperature of is the measure of

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

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

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

Which Statement about gases is not correct?

Boyle's law is represented as :

Which of the following is the simplest form of matter?

The intramolecular force in gases are :

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The molar value of CO₂is maximum at :