KINETIC PARTICLE THEORY

Which of the following groups consists of mixtures only?

• chlorine, water, salt

• chlorine, water, sand

• salt, water, salt

• salt, air, brass

Which of the following atoms has a nucleus which does not contain any neutrons?

• Aluminium

• Lead

• Chlorine

• Hydrogen

In an air-conditioned bus, water is slowly collected on the glass window panes. This process is best described by

• melting

• boiling

• evaporation

• condensation

The particles in the gas can be described as

• expanding in fixed directions

• moving randomly in all directions

• vibrating about a fixed position

• rising upwards

Which one of the following conditions increases the rate of movement of particles in matter?

• increase in density

• increase in mass

• increase in volume

• increase in temperature

The diagram shows some of the changes of state. Which statement is correct?

• Although the change is not shown on the diagram, a gas can change directly to a solid.

• The changes 1 and 3 involve particles moving closer together

• The changes 2 and 4 involve particles moving further apart.

• The changes 3, 4 and 5 all involve the release of energy.

The graph shows the change in temperature with time when ice at – 20^oC is heated to 120 ^oC

Which points shows the correct change taking place between the points?

• P → Q Average energy of particles remains constant

• Q → R ice melting

• R → S the volume of steam is increasing

• T → U water to boiling

Which statement about the behaviour of the particles in a gas is not correct?

• They spread throughout the vessel in which they contained

• They are able to move at high speeds.

• They are arranged in regular patterns

• There are large spaces between the particles

Which of the following is an example of diffusion?

• Bubbles rising in a beaker of boiling water

• Steam condensing on a cold window

• Water spreading out on the surface of a table

• The spreading of the smell of flowers in a garden

An inflated balloons will shrink if placed in a refrigerator. This is because the lower temperature causes the gas particles in the balloons to move

• Faster and become closer together

• Faster and become further apart

• Slower and become closer together

• Slower and become further apart