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Aptitude Tests

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Classes
- Grade 9
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Aptitude Tests

Browse Worksheets
Classes
- Grade 9
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- Grade 11
- Grade 12
Aptitude Tests

ECAT MCAT : Chemistry chapter 3 GASES

Leave a Comment / By Afshan JAMAL / August 15, 2026

Welcome to your ECAT MCAT : Chemistry chapter 3 GASES

In solids, the temperature is the measure of

Choose the correct option.

Rotational kinetic energies

Translational kinetic energies

Vibrational kinetic energies

None of the above

None

Which statement about gases is not correct?

Choose the correct option.

They spread throughout the vessel.

Pressure is due to collision

There are large spaces between the molecules.

Molecules are arranged regularly.

None

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

Choose the correct option.

Evaporation

Effusion

Conduction

Difusion

None

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

Choose the correct option.

Slanting straight line

Parabolic

Straight line, parallel to pressure axis

Of neither type

None

Which of the following is the simplest form of matter?

Choose the correct option.

Gaseous state

Liquid State

Solid State

All of above

None

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

Choose the correct option.

Temperature and quantity of a gas.

Pressure and volume

Volume and quantity of a gas.

Pressure and quantity of a gas.

None

In gases and liquids, temperature is the measure of:

Choose the correct option.

Average translational kinetic energies of molecules.

Average vibrational kinetic energies of molecules.

Average rotational kinetic energies of molecules.

None of above

None

Which of the following is the simplest form of matter?

Choose the correct option.

Gaseous state

Liquid state

Solid state

All of above

None

Cooling happens under the Joule Thomson Effect due to sudden

Choose the correct option.

Contraction

Absorption

Expansion

All of above

None

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

Choose the correct option.

Charles's law

Newton's law

Coulomb's law

Boyle's law

None

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

Choose the correct option.

Remain unchanged

Doubled

Reduced

Increased four times

None

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

Choose the correct option.

Viscosity

Molar mass

Momentum

All of above

None

The rate of diffusion of a gas is:

Choose the correct option.

Inversely proportional to its density

Inversely proportional to square root of its molecular mass

Directly proportional to molecular mass

Directly proportional to its density

None

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

Choose the correct option.

Charles's law

Graham's law

Boyle's law

Gas law

None

All gases can be compressed by:

Choose the correct option.

Keeping constant pressure

Decreasing pressure

Increasing pressure

None of the above

None

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

Choose the correct option.

Temperature and quantity of a gas

Pressure and Volume

Volume and quantity of a gas

Pressure and quantity of a gas

None

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

Choose the correct option.

Isobaric

Isothermal

Isotherm

None of above

None

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

Choose the correct option.

Difference in molecular masses of air gases.

Difference in partial pressure of gas molecules.

Unequal number of different gas molecules.

Elastic collision of gas molecules.

None

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

Choose the correct option.

Obey gas laws.

Have definite volume.

Collide with the walls of container.

Collide with each other.

None

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

Choose the correct option.

Remains constant

Double

One half

None of above

None

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