During the industrial extraction of iron in a blast furnace, iron(III) oxide (Fe2O3\text{Fe}_2\text{O}_3Fe2O3) reacts with carbon monoxide (CO\text{CO}CO) to produce iron and carbon dioxide.
State what is meant by reduction in terms of oxygen.
110 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.