Practice States of Matter MCQs

Question 1

Real gases deviate most from ideal gas behaviour under which combined conditions?

Accepted Answer

B. High pressure and low temperature

Answer

A. Low pressure and high temperature

Answer

C. Low pressure and low temperature

Answer

D. High pressure and high temperature

Question 2

Which state of matter has a definite shape and a definite volume?

Accepted Answer

C. Solid

Answer

A. Gas

Answer

B. Liquid

Answer

D. Plasma

Question 3

What is the process called when a liquid changes directly into a gas at its surface below the boiling point?

Accepted Answer

B. Evaporation

Answer

A. Condensation

Answer

C. Sublimation

Answer

D. Freezing

Question 4

What term describes the direct change of a solid into a gas without passing through the liquid state?

Accepted Answer

A. Sublimation

Answer

B. Evaporation

Answer

C. Deposition

Answer

D. Melting

Question 5

At standard atmospheric pressure, at what temperature does pure water boil?

Accepted Answer

C. 100 degrees Celsius

Answer

A. 0 degrees Celsius

Answer

B. 50 degrees Celsius

Answer

D. 212 degrees Celsius

Question 6

Gases can be compressed easily compared to solids and liquids mainly because of what property?

Accepted Answer

B. Large spaces between particles

Answer

A. Tightly packed particles

Answer

C. Fixed particle positions

Answer

D. Strong intermolecular bonds

Question 7

The change of state from a liquid to a solid is known as what?

Accepted Answer

B. Freezing

Answer

A. Melting

Answer

C. Boiling

Answer

D. Sublimation

Question 8

Which gas law states that at constant temperature, the pressure of a fixed amount of gas is inversely proportional to its volume?

Accepted Answer

B. Boyle's law

Answer

A. Charles's law

Answer

C. Avogadro's law

Answer

D. Gay-Lussac's law

Question 9

According to Charles's law, at constant pressure, the volume of a fixed amount of gas is directly proportional to what?

Accepted Answer

B. Its absolute temperature

Answer

A. Its mass

Answer

C. Its pressure

Answer

D. Its density

Question 10

What is the value of absolute zero on the Celsius temperature scale?

Accepted Answer

C. -273.15 degrees Celsius

Answer

A. 0 degrees Celsius

Answer

B. -100 degrees Celsius

Answer

D. -373 degrees Celsius

Question 11

The ideal gas equation PV=nRT relates pressure, volume, temperature and what other quantity?

Accepted Answer

B. Number of moles

Answer

A. Density

Answer

C. Molar mass

Answer

D. Heat capacity

Question 12

What name is given to the fourth, highly energetic state of matter consisting of ionised gas found in stars?

Accepted Answer

A. Plasma

Answer

B. Bose-Einstein condensate

Answer

C. Superfluid

Answer

D. Colloid

Question 13

The specific temperature and pressure at which the solid, liquid and gas phases of a substance coexist in equilibrium is called what?

Accepted Answer

B. Triple point

Answer

A. Critical point

Answer

C. Boiling point

Answer

D. Melting point

Question 14

According to Graham's law of diffusion, the rate of diffusion of a gas is inversely proportional to the square root of what property?

Accepted Answer

A. Its molar mass

Answer

B. Its pressure

Answer

C. Its volume

Answer

D. Its temperature

Question 15

Beyond the critical temperature of a substance, what happens to the distinction between its liquid and gas phases?

Accepted Answer

B. The liquid and gas phases become indistinguishable

Answer

A. The liquid phase becomes denser than the solid

Answer

C. The substance always solidifies

Answer

D. The gas phase disappears completely

Practice MCQs