Question

`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 1

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)]`