Oxidation states of P in H4P2O5, H4P2O6, H4P2O7, are respectively:
+ 3, + 4, + 5
+ 3, + 5, + 4
+ 5, + 3, + 4
+ 5, + 4, + 3
Oxidation state of H is +1 and that of O is -2.
Let the oxidation state of P in the given compound x.