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Superphosphate of lime, a phosphate fertilizer, is obtained by the reaction of

Options

  1. Acalcium phosphate with sodium hydroxide
  2. Bcalcium phosphate with sulphuric acid
  3. Ccalcium phosphate with hydrogen chloride
  4. Dcalcium phosphate with nitric acid

Correct answer

B. calcium phosphate with sulphuric acid

Step-by-step solution

Superphosphate of lime is a mixture of calcium dihydrogen phosphate and calcium sulphate. It is prepared by the reaction of calcium phosphate with concentrated sulphuric acid. Ca₃(PO₄)₂ + 2H₂SO₄ Ca(H₂PO₄)₂ + 2CaSO₄ Answer: calcium phosphate with sulphuric acid

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