A science museum is checking labels for an exhibition about how raw materials are used to make fertilisers.
Statement 1: Mined potassium compounds are reacted with ammonia before they can be used in fertilisers.
Statement 2: Ammonia is oxidised using air during the production of nitric acid.
Statement 3: Sulfur is used to make sulfuric acid, which reacts with ammonia to produce ammonium sulfate.
Which statements are correct?
Only statements 1 and 2 are correct
Only statements 2 and 3 are correct
Only statement 1 is correct
Only statements 1 and 3 are correct
136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.