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KMnO4 can be prepared fromK2MnO4 as per ...

`KMnO_4` can be prepared from`K_2MnO_4` as per the reaction:
The reaction can go the completion by removing `OH^(ɵ)` ions by adding.

A

HCl

B

KOH

C

`CO_(2)`

D

`SO_(2)`

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The correct Answer is:
C
`MnO_(4)^(-)` oxidizes HCl and `SO_(2) " to " Cl_(2) and SO_(3)` respectively.
`MnO_(4)^(-)` does not oxidizes `H_(2)CO_(3)` (maximum oxidation state of C)
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