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)^(2-),PO_(4)^(3-),SO_(4)^(2-)`

Answer

4

Explanation

`N_(2)^(+), O_(2), B_(2), N_(2)^(2-)` have symmetrical electronic distribution in their HOMO and are also paramagnetic.
`N_(2)^(+)` paramagnetic and symmetrical electronic distribution in their HOMO.
`O_(2)` paramagnetic and symmetrical electronic distribution in their HOMO.
`B_(2)` paramagnetic and symmetrical electronic distribution in their HOMO.
`N_(2)^(2-)` paramagnetic and symmetrical electronic distribution in their HOMO.
`O_(2)^(2-)` diamagnetic and symmetrical electronic distribution in their HOMO.
`C_(2)` diamagnetic and symmetrical electronic distribution in their HOMO.
`C_(2)^(2-)` diamagnetic and symmetrical electronic distribution in their HOMO.