KMnO(4) is not used as primary standard ...

`KMnO_(4)` is not used as primary standard because

It is easily obtained in pure state free from `MnO_(2)`

It is very difficulty to obtain in pure state as it is not free from `MnO_(2)`.

It is very difficulty in pure state free from `MnO_(2)`

It is easily obtained in pure state but not free from` SO_(2)`.

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The correct Answer is:

`KMnO_(4)` not existed as pure state

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STATEMENT-1: KMnO_(4) is not used as a primary standard substance. STATEMENT-2: It is deliquescent in nature.

KMnO_(4) is used

STATEMENT-1 KMnO_(4) acts as powerful oxidising agent in acids, alkaline and neutral medium. STATEMENT-2: Equivalent weight of KMnO_(4) in acidic medium in M/5 and in strongly alkaline medium in M/3. STATEMENT-3 : KMnO_(4) solution is used as a primary standard and acts as self indicator during its titration more Mohr salt.

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