1.

Oxidation states of P in H_4P_2O_5, H_4P_2O_6 and H_4P_2O_7 are respectively :

Answer»

`+3, +5 and +4`
`+5, +3 and +4`
`+5, +4 and +3`
`+3, +4 and +5`

ANSWER :D


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