Multiple choice

Which of the following is the chemical formula of superphosphate?

  1. Ca(H2PO4)2, CaSO4.2H2O

  2. Ca3(PO4)3

  3. Ca(NO3)2, NH4NO3

  4. Ca(H2PO4)2

  5. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct because when calcium phosphate is heated with concentrated H2SO4, it forms a mixture of primary phosphates of calcium and gypsum. Hence, it is called the superphosphate of lime.