Electrolysis Quiz

Where are metals (or hydrogen) formed during electrolysis using inert electrodes?

• At the anode

• At the cathode

• In the electrolyte

• Outside the electrolytic cell

What happens to positive ions (cations) in the electrolyte during electrolysis?

• They move to the anode and are oxidised.

• They move to the cathode and are reduced.

• They remain stationary in the electrolyte.

• They move to the cathode and are oxidised.

During the electrolysis of binary ionic compounds in the molten state, where do the negative ions (anions) go?

• To the cathode

• To the anode

• They remain in the molten state

• They are discharged at the cathode

What is produced at the cathode during the electrolysis of aqueous solutions if the metal is more reactive than hydrogen?

• Oxygen

• Chlorine

• Hydrogen

• The metal

What is produced at the anode during the electrolysis of aqueous solutions containing halide ions?

• Oxygen

• The halogen

• Hydrogen

• The metal

What is formed at the anode during the electrolysis of sodium chloride solution?

• Sodium

• Hydrogen

• Chlorine

• Oxygen

What happens at the cathode during the electrolysis of copper sulfate solution?

• OH- ions go to the cathode, and O2 (g) is produced.

• Cu2+ ions go to the cathode, and Cu (s) is produced.

• SO4 2- ions go to the cathode, and O2 (g) is produced.

• H+ ions go to the cathode, and H2 (g) is produced.

What is produced at the anode during the electrolysis of copper sulfate solution?

• Cu (s) is produced.

• O2 (g) is produced.

• H2 (g) is produced.

• Cu2+ ions are produced.

What mnemonic helps to remember the processes of oxidation and reduction?

• OIL RIG

• RED CAT

• AN OX

• LEO GER

What does the acronym OIL RIG stand for?

• Oxidation Is Loss, Reduction Is Gain (of protons)

• Oxidation Is Loss, Reduction Is Gain (of neutrons)

• Oxidation Is Loss, Reduction Is Gain (of electrons)

• Oxidation Is Loss, Reduction Is Gain (of energy)