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Acidified potassium permangate can't oxi...

Acidified potassium permangate can't oxidize

A

`C_(2)O_(4)^(2-)`

B

`N_(2)H_(4)`

C

`SO_(4)^(2-)`

D

`S_(2)O_(3)^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
C
Because `SO_(4)^(2-)` is not a reducing agent as it has S in its highest oxidation state. It oxidizes oxalate to `CO_(2)`, hydrazine to `N_(2)` and thiosulphate to sulphate. Also note that `H_(2)` can't reduce acidified `KMnO_(4)`.
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