Electrolysis Quiz

What happens to positively charged ions during electrolysis?

• They move to the positive electrode

• They move to the negative electrode

• They remain stationary

• They dissolve in the solution

What is the name of the negative electrode?

• anode

• cathode

• anion

• cation

When we electrolyse an ionic compound it must be?

• motlten

• molten or

  in solution

• solid

• in solution

What is the mnemonic to remember oxidation and reduction?

• OIL RIG

• RED OX

• GAIN LOSS

• LOSE GAIN

What is the chemical equation for the reduction of aluminium ions at the cathode?

• Al3+ (l) + 3e- → Al (s)

• Al3+ (l) - 3e- → Al (s)

• Al3+ (l) + 2e- → Al (s)

• Al3+ (l) - 2e- → Al (s)

What are the products when molten zinc chloride is electrolysed?

• hydrogen and oxygen

• zinc and chlorine

• hydrogen and chlorine

• zinc and oxygen

What is the chemical equation for the oxidation of chloride ions at the anode?

• 2Cl- (l) → Cl2 (g) + 2e-

• 2Cl- (l) + 2e- → Cl2 (g)

• Cl2 (g) + 2e- → 2Cl- (l)

• Cl2 (g) → 2Cl- (l) + 2e-

What is the main advantage of using electrolysis for metal extraction?

• It is a fast process

• It produces high-quality metals

• It requires low energy

• It is suitable for all metals

What is the chemical equation for the reduction of copper ions at the cathode?

• Cu2+ (l) + 2e- → Cu (s)

• Cu2+ (l) - 2e- → Cu (s)

• Cu2+ (l) + e- → Cu (s)

• Cu2+ (l) - e- → Cu (s)

What is the chemical equation for the oxidation of oxide ions at the anode?

• 2O2- (l) → O2 (g) + 4e-

• 2O2- (l) + 4e- → O2 (g)

• O2 (g) + 4e- → 2O2- (l)

• O2 (g) → 2O2- (l) + 4e-