Chemistry 1 Revision (Foundation)

Which ink contains 3 colours?

• A

• C

• D

• F

Which ink contains the greatest number of dyes?

• A

• B

• C

• D

• E

How do you work out an rf value?

Answer explanation

Divide the distance moved by the spot, by the distance moved by the solvent (liquid)

Give the name of the state change when a liquid becomes solid

• Boiling

• Condensing

• Evaporating

• Freezing

Which letter represents where the substance turns into a gas?

• A

• B

• C

• D

• E

What does electrolysis do?

• Covalent substances are split up using electricity

• Ionic compounds are decomposed using electricity

• Mixtures are separated using electricity

What charge does the cathode have?

(Hint: PANIC)

• Negative

• Positive

• Neutral

What charge does the anode have?

(Hint: PANIC)

• Negative

• Positive

• Neutral

What charge does the anode have?

(Hint: PANIC)

• Negative

• Positive

• Neutral

Why must the electrolyte be liquid, not a solid or powder?

• Solid ionic compounds don't conduct electricity, because the ions cannot move

• Solid ionic compounds can be used as they do conduct electricity

• Solid ionic compounds don't conduct electricity because they don't have delocalised electrons