Which answer best matches the AQA GCSE Chemistry Production and uses of NPK fertilisers objective: recall the names of salts made when phosphate rock reacts with nitric acid, sulfuric acid and phosphoric acid. (Chemistry only)?

The correct option is Calcium sulfate. It matches Production and uses of NPK fertilisers because it directly supports: Recall the names of salts made when phosphate rock reacts with nitric acid, sulfuric acid and phosphoric acid. (Chemistry only).

The correct option is Calcium sulfate. It is correct because it tests recall the names of salts made when phosphate rock reacts with nitric acid, sulfuric acid and phosphoric acid. (Chemistry only) within The Haber process and the use of NPK fertilisers. Keep the Using resources concept boundary clear: do not swap finite resources with renewable resources, potable water with pure water, reuse with recycling, alloys with pure metals, polymers with composites, corrosion with oxidation, or fertilisers with nutrients unless the question asks for that comparison. Other options are weaker if they answer a neighbouring resource or sustainability idea instead of this exact objective.