Oxidation state of `P` in `H_(4)P_(2)O_(5), H_(4)P_(2)O_(6), H_(4)P_(2)O_(7)` are respectively

Options

A. `+3,+4,+5`
B. `+3,+5,+4`
C. `+5,+3,+4`
D. `+5,+4,+3`

Answer

1

Explanation

`underset("Pyrophosphoric acid")(HO-underset(O)underset(||)overset(H)overset(|)(P)-O-underset(O)underset(||)overset(H)overset(|)(P)-OH)`
`H_(4)P_(2)O_(7) : 4(+1)+2(X)+7(-2)=0`
`X=+3`
`underset("Hypophosphoric acid")(HO-underset(OH)underset(|)overset(O)overset(||)(P)-underset(OH)underset(|)overset(O)overset(||)(P)-OH)`
`H_(4)P_(2)O_(6) : 4(+1)+2(X)+6(-2)=0`
`X=+4`
`underset("Pyrophosphoric acid")(HO-underset(OH)underset(|)overset(O)overset(||)(P)-O-underset(OH)underset(|)overset(O)overset(||)(P)-OH)`
`H_(4)P_(2)O_(7) : 4(+1)+2(X)+7(-2)=0`
`X=+5`
this question can also be credited to redox reactions part 1