Which equation shows a metal being oxidised?
2CuO+C→2Cu+CO22\text{CuO} + \text{C} \rightarrow 2\text{Cu} + \text{CO}_22CuO+C→2Cu+CO2
CaCO3→CaO+CO2\text{CaCO}_3 \rightarrow \text{CaO} + \text{CO}_2CaCO3→CaO+CO2
2Fe2O3+3C→4Fe+3CO22\text{Fe}_2\text{O}_3 + 3\text{C} \rightarrow 4\text{Fe} + 3\text{CO}_22Fe2O3+3C→4Fe+3CO2
4Na+O2→2Na2O4\text{Na} + \text{O}_2 \rightarrow 2\text{Na}_2\text{O}4Na+O2→2Na2O
39 exam-style questions on AQA GCSE Chemistry 4.1 Reactivity of metals, covering 4.1.1 Metal oxides, 4.1.2 The reactivity series, 4.1.3 Extraction of metals and reduction, and 4.1.4 Oxidation and reduction in terms of electrons. Each one has a worked solution and a mark scheme showing where the marks go.