A company extracts two metals, P and Q, from their oxides. The table shows where each metal is in the reactivity series compared with carbon.
| Metal | Position compared with carbon |
|---|---|
| P | Below carbon |
| Q | Above carbon |
Explain which metal must be extracted by electrolysis and how electrolysis of its oxide produces the metal.
76 exam-style questions on AQA GCSE Chemistry 4.3 Electrolysis, covering 4.3.1a The process of electrolysis, 4.3.1b Half equations in electrolysis, 4.3.2 Electrolysis of molten ionic compounds, 4.3.3 Using electrolysis to extract metals, 4.3.4 Electrolysis of aqueous solutions, and 4.3.5 Representation of reactions at electrodes as half equations. Each one has a worked solution and a mark scheme showing where the marks go.