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KMnO4 acts as an oxidising agent in acid...

`KMnO_4` acts as an oxidising agent in acidic medium. The number of moles of `KMnO_4` that will be needed to react with one mole of sulphide ions in acidic solution as

A

`(2)/(5)`

B

`(3)/(5)`

C

`(4)/(5)`

D

`1`

Text Solution

Verified by Experts

The correct Answer is:
A
`underset((n=5))("Eq of" MnO_(4)^(ө))=underset((n=2)) ("Eq of" SO_(3)^(2-)(SO_(3)^(2-)+2e^(-)))`
`1Eq = 1Eq`
`(1)/(5)mol=(1)/(2)mol`
`(2)/(5) "mol of" MnO_(4)^(ө) = 1 "mol of" SO_(3)^(2-)`.
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