Iron is extracted by heating iron(III) oxide with carbon. Aluminium is extracted by electrolysis of molten aluminium oxide.
Statement 1: in both processes, the metal oxide loses oxygen, so it is reduced
Statement 2: in both processes, the metal ions gain electrons to form metal atoms
Statement 3: carbon cannot reduce aluminium oxide because aluminium is more reactive than carbon
Statement 4: iron could not be extracted by electrolysis, because iron is less reactive than carbon
Which statements are correct?
1 and 3 only
2 and 4 only
1, 3 and 4 only
1, 2 and 3 only
45 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.