To an acidic solution of anion a few d...

To an acidic solution of anion a few drops of acidified `KMnO_(4)` are added. Which one of the following anions , if present wil not decolourise the `KMnO_(4)` solutions ?

A

`CO_(3)^(2-)`

B

`NO_(2)^(ө)`

C

`S^(2-)`

D

`Cl^(ө)`

Verified by Experts

The correct Answer is:

A

Oxidation state of `C` in `CO_(3)^(2-)` is `+4`, which is maximum.
So, it will not be oxidised.

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