Which substances are produced when phosphate rock is treated with nitric acid?
Calcium nitrate and phosphoric acid
Calcium nitrate and calcium sulfate
Calcium phosphate and calcium nitrate
Calcium sulfate and phosphoric acid
39 exam-style questions on AQA GCSE Chemistry 10.4 The Haber process and the use of NPK fertilisers, covering 10.4.1a The Haber process, 10.4.1b Equilibrium and rate in the Haber process, and 10.4.2 Production and uses of NPK fertilisers. Each one has a worked solution and a mark scheme showing where the marks go.