Review Kinetic Theory of Matter Past Paper Question

Why can a gas be compressed easily into a smaller volume?

0625/21/O/N/23

• The particles are far apart.

• The particles do not attract each other.

• The particles move randomly.

• The volume of each particle can be reduced.

Brownian motion is the random motion of particles. In which states of matter is Brownian motion observed?

0625/22/O/N/23

• gases, liquids and solids

• gases and liquids only

• gases and solids only

• liquids and solids only

A sealed bottle of constant volume contains air. The air in the bottle is heated by the Sun. What is the effect on the average speed of the air particles in the bottle and the average distance between them?

0625/23/O/N/23

• A

• B

• C

• D

A piece of solid metal melts to become a liquid. How do the particles of metal or their behaviour change?

0625/23/M/J/24

• They increase in size.

• They move around each other.

• They move much further apart.

• They vibrate more about their fixed positions.

A student uses a microscope to observe pollen moving on the surface of water. Which statement describes the reason for this movement?

0625/21/M/J/23

• Water molecules are moved by microscopic pollen particles.

• Water molecules are moved by pollen molecules.

• Microscopic pollen particles are moved by water molecules.

• Pollen molecules are moved by water molecules.

Four students describe the phrase ‘absolute zero’ during a lesson on the particle model. Which student is correct?

0625/22/M/J/23

• This is the lowest possible temperature.

• Particles in a solid start vibrating.

• Particles do not have any weight.

• Particles have the least gravitational potential energy.

What is the lowest possible temperature (absolute zero) and what happens to the energy of particles at this temperature? What is the lowest possible temperature (absolute zero) and what happens to the energy of particles at this temperature?

0625/23/M/J/23

• A

• B

• C

• D

Which statement correctly describes a change of state?

0625/22/F/M/24

• A gas condenses to form a liquid.

• A liquid melts to form a solid.

• A solid condenses to form a liquid.

• A solid boils to form a gas.

What happens when the temperature of a liquid increases?

0625/22/F/M/23

• The mass of the liquid increases, making the liquid less dense.

• The mass of the liquid increases, making the liquid more dense.

• The volume of the liquid increases, making the liquid less dense.

• The volume of the liquid increases, making the liquid more dense.

A sealed rigid container has a fixed volume. The container is filled with air. The container is placed in a freezer cabinet and the temperature of the air in the container decreases. Which row correctly describes what happens to the air in the container?

0625/21/M/J/22

• A

• B

• C

• D