Action of phosphoric acid on rock phosphate produces_________________?
Correct answer: B. Triple superphosphate
- A. Superphosphate
- B. Triple superphosphate
- C. Nitrophosphate
- D. Diammonium phosphate
Explanation
Phosphoric acid reacts with rock phosphate to produce triple superphosphate, which has a high concentration of water-soluble phosphate. Ordinary superphosphate is made by treating rock phosphate with sulphuric acid, the common trap in this question.
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