Question detail
Which of the following is a key raw material in the production of soluble salts from phosphate rock?
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. Nitric acid
- B. Ammonia
- C. Water
- D. Sulfuric acid
Answer
The correct option is Nitric acid. This answer is correct because it matches the approved learning objective to describe treatment of phosphate rock with nitric acid to produce soluble salts for fertilisers. (Chemistry only) in the subtopic Production and uses of NPK fertilisers.
Explanation
The correct option is Nitric acid. Nitric acid is correct because it directly supports the approved learning objective to describe treatment of phosphate rock with nitric 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 nitric acid with the treatment using sulfuric acid.
Remember that nitric acid treatment specifically produces soluble nitrates, while sulfuric acid treatment produces different soluble salts. Focus on the specific acid used and the resulting salts.
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