Match Column I with Column II for the oxidation states of the central atoms.

Option (i) Cr2O72-→ (d) +6

By oxidation rule we can calculate the unknown oxidation number.


Cr2O72-


Option (ii) MnO-4→ (e) +7


MnO-4


Option (iii) VO-3→ (c) +5


VO-3


Option (iv) FeF3-6→ (a) +3


FeF3-6


1