1.

`H_(3)PO_(4) overset(Delta)rarr X overset(Delta)rarrY` gives a white precipitate with silver nitrate solution. When ammonium molybdate and conc `HNO_(3)` were added to `H_(3)PO_(4)`, yellow precipitate A is formed. The formula of A is:A. `(NH_(4))_(3)PO_(3).12 MoO_(3)`B. `(NH_(4))_(3)PO_(4).12 MoO_(6)`C. `(NH_(4))_(3)PO_(4).12MoO_(4)`D. `(NH_(4))_(3)PO_(4).12MoO_(3)`

Answer» Correct Answer - D
`X=H_(4)P_(2)O_(7) , Y = HPO_(3)`
A = ammonium 12 - molybdo phosphate
`[(NH_(4))_(3)PO_(4).12MoO_(3)]`


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