Question detail
What salt is produced when phosphate rock reacts with nitric 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 nitrate
- B. Calcium phosphate
- C. Calcium nitrate
- D. Ammonium sulfate
Answer
The correct option is Calcium nitrate. This answer is correct because it matches the approved learning objective to recall the names of salts made when phosphate rock reacts with nitric acid, sulfuric acid and phosphoric acid. (Chemistry only) in the subtopic Production and uses of NPK fertilisers.
Explanation
The correct option is Calcium nitrate. Calcium nitrate is correct because it directly supports the approved learning objective to recall the names of salts made when phosphate rock reacts with nitric acid, sulfuric acid and phosphoric acid. (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 Salt Names
Students often confuse the names of salts produced from phosphate rock reactions with different acids.
To fix this, students should memorize the specific salts formed from each acid: for nitric acid, it's calcium nitrate; for sulfuric acid, it's calcium sulfate; and for phosphoric acid, it's calcium phosphate.
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