Chemistry state of matter from Ms Celine

In which changes do the particles move further apart?

• W and X

• W and Z

• X and Y

• Y and Z

Diagrams X, Y and Z represent the three states of matter.
Which change occurs during boiling?

• X to Y

• Y to Z

• Z to X

• Z to Y

Which change of state takes place during evaporation?

• gas to liquid

• liquid to gas

• liquid to solid

• solid to gas

In which process do particles move closer together but remain in motion?

• condensation

• diffusion

• evaporation

• freezing

5 The changes that occur when a substance changes state are shown below.
Which process, W, X, Y or Z, is occurring in the following four situations?

• A

• B

• C

• D

The diagram shows a sugar lump in a cup of tea.

Which two processes must happen to spread the sugar evenly in the tea?

• A

• B

• C

• D

A sugar cube is dropped into a hot cup of tea. The tea is not stirred. Which statement explains why the tea becomes sweet?

• The heated water molecules penetrate the sugar cube.

• The hot tea causes the sugar to melt.

• The sugar cube dissolves and its molecules diffuse.

• The sugar molecules get hot and evaporate.

A crystal of purple potassium manganate(VII) was added to each of the beakers shown in the diagram.

One beaker contained hot water and the other beaker contained cold water.

In both beakers the purple colour of the potassium manganate(VII) spreads out.

Which result and explanation are correct?

• A

• B

• C

• D

Which statement is an example of diffusion?

• A kitchen towel soaks up some spilt milk

• Ice cream melts in a warm room.

• Pollen from flowers is blown by the wind.

• The smell of cooking spreads through a house

A few drops of perfume were spilt on the floor. A few minutes later the perfume could be smelt a few metres away. Which two processes had taken place?

• distillation and condensation

• distillation and diffusion

• evaporation and condensation

• evaporation and diffusion