sblock Elements 2 Question 16

17. MgSO4 on reaction with NH4OH and Na2HPO4 forms a white crystalline precipitate. What is its formula? (2006,3M)

(a) Mg(NH4)PO4

(c) MgCl2MgSO4

(b) Mg3(PO4)3

(d) MgSO4

(1993, 1M)

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Answer:

Correct Answer: 17. (a)

Solution:

  1. Magnesium ammonium phosphate is precipitated out.

MgSO4+NH4OH+Na2HPO4Mg(NH4)PO4+Na2SO4



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