Total number of species that can be oxidzed by acidic permanganate ion `(MnO_(4)^(-)//H^(+))`.
`I^(-),Fe^(2+),CO_(2),C_(2)O_(4)^(2-),S^(2-),SO_(3)^(2-),NO_(2)^(-),PO_(4)^(3-),SO_(4)^(2-)`

Answer

6

Explanation

All the species which are not in their highest oxidation state can be oxidised by `MnO_(4)^(-)//H^(+)`.
`I^(-),Fe^(2+),C_(2)O_(4)^(2-),S^(2-),SO_(3)^(2-),NO_(2)^(2-),`[Six]