Superphosphate of lime—a phosphate fertilizer—is obtained by the reaction of
- A. calcium phosphate with sodium hydroxide
- B. calcium phosphate with sulphuric acid ✓
- C. calcium phosphate with hydrogen chloride
- D. calcium phosphate with nitric acid
Correct Answer: B. calcium phosphate with sulphuric acid
Explanation
Superphosphate of lime is commercially produced by treating insoluble calcium phosphate (rock phosphate) with concentrated sulphuric acid to make it soluble for plant uptake.
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