What are the oxidation states of phosphorus in the following compounds ?
`H_(3)PO_(2),H_(3)PO_(4),Mg_(2)P_(2)O_(7),PH_(3),HPO_(3)`

Options

A. `+1, +3, +3, +3, +5`
B. `+3, +3, +5, +5, +5`
C. `+1, +2, +3, +5, +5`
D. `+1, +5, +5, -3, +5`

Answer

D

Explanation

`H_(3)PO_(2):+3+X-4=0rArrx=+1`
`H_(3)PO_(4):+3+x-8=0 rArr x=+5`
`Mg_(2)P_(2)O_(7):+4+2x-14=0 rArr x=+5`
`PH_(3):x+3=0 rArr x=-3`
`HPO_(3):+1+x-6=0 rArr x=+5`