Revision Questions

Bethan has collected a sample of seawater in a bucket from her local beach. The seawater contains water, salt and sand. Which series of separation techniques could she use to separate and collect the sand, salt and water?

• Filtration followed by evaporation

• Distillation followed by filtration

• Filtration followed by distillation

Which method involves evaporating half the solvent away?

• Crystallisation

• Evaporation

• Magnetic Separation

• Filtering

What metal is magnetic?

• Gold

• Iron

• Silver

• Aluminium

which substance can be separated from its mixture by filtration?

• water from seawater

• small stones from seawater

• salt from seawater

Chromatography separates the mixture of dyes on the basis of their.........

• density

• gravity

• boiling point

• solubility

If the substance is not soluble in water, what will happen to the dot?

• Dot moves to the top of the paper

• Dot moves to the left or right

• Dot does not move at all

• Dot moves down to the paper of the paper

In paper chromatography, the MOST soluble solute .....

• Does not move from the start point

• Travels furthest away from the start point

• Stays closest to the start point

• can be found in the middle of the chromatogram

As you go down group 1, reactivity:

• Increases

• Decreases

• Stays the same

Group 1 are also known as:

• Nobel gases

• Alkali metals

• Halogens

As you go down group 7, reactivity:

• Increases

• Decreases

• Stays the same