1.

KMnO_(4) acts as an oxidizing agent in acidic medium. The number of moles of KMnO_(4) that will be needed to react with one moleof sulphide ions in acidic solution is

Answer»

`(2)/(5)`
`(3)/(5)`
`(4)/(5)`
`(1)/(5)`

Solution :`2KMnO_(4)+ 3H_(2)SO_(4) rarr K_(2)SO_(4) + 2MnSO_(4) + 3H_(2)O + 5(O)`
`H_(2)S+ (O) rarrH_(2)OI +S ] xx 5`
`bar ( 2KMnO_(4) + 3H_(2)SO_(4) + 5H_(2)Srarr K_(2)SO_(4) + 8 H_(2)O5S)`
1 mole of `S^(2-)` ions will required`KMnO_(4) = ( 2)/( 5) `moles


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