KMnO(4) in basic medium is used as...

`KMnO_(4)` in basic medium is used as

strong oxidising agent

strong reducing agent

strong hydrogenating agent

poor reducing agent

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The correct Answer is:

Due to the presence of nascent oxygen [O], `KMnO_(4)` (in basic medium) behaves like strong oxidising agent.
`2KMnO_(4)+2KOHrarr2K_(2)MnO_(4)+H_(2)O+[O]`

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KMnO_(4) in basic medium is reduced to

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KMnO_(4) reacts with KI in basic medium to from I_(2) and MnO_(2) . When 250 mL of 0.1 M KI solution is mixed with 250 mL of 0.02 M KMnO_(4) in basic medium, what is the number of moles I_(2) formed ?

A : Equivalent weight of KMnO_(4) in acidic medium is M/5 . R : In acidic medium 1 mol of MnO_(4)""^(-) gains 5 electron.

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.

One mole of FeC_(2)O_(4) is oxidised by KMnO_(4) in acidic medium. Number of moles of KMnO_(4) used are

Assertion :- Equivalent weight of KMnO_(4) in acidic medium is M//5 (M=molecular weight) while in basic medium, it is equal of M/3. Reason :- In acidic medium, 1 mol of MnO_(4)^(-) gains 5 mole electrons while in basic medium it gains 3 mole electrons.

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Practice exercise (Exercise 1)

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