Question detail
What is produced when phosphate rock is treated with sulfuric acid?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
The Haber process and the use of NPK fertilisers
Question
- A. Ammonium sulfate
- B. Soluble salts for fertilisers
- C. Nitric acid
- D. Phosphoric acid
Answer
The correct option is Soluble salts for fertilisers. This answer is correct because it matches the approved learning objective to describe treatment of phosphate rock with sulfuric acid to produce soluble salts for fertilisers. (Chemistry only) in the subtopic Production and uses of NPK fertilisers.
Explanation
The correct option is Soluble salts for fertilisers. Soluble salts for fertilisers is correct because it directly supports the approved learning objective to describe treatment of phosphate rock with sulfuric acid to produce soluble salts for fertilisers. (Chemistry only). This belongs to the subtopic Production and uses of NPK fertilisers within The Haber process and the use of NPK fertilisers, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Production and uses of NPK fertilisers.
Common mistake
Common Mistake in Phosphate Rock Treatment
Students often confuse the treatment of phosphate rock with sulfuric acid with its treatment using nitric acid.
Remember that sulfuric acid produces different soluble salts compared to nitric acid. Focus on the specific acids and their respective reactions with phosphate rock.
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