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The number of moles of KMnO(4) that will...

The number of moles of `KMnO_(4)` that will be needed to react with `1 mol` of sulphite ion in acidic solution is

A

`(2)/(5)`

B

`(3)/(5)`

C

`(4)/(5)`

D

1

Text Solution

Verified by Experts

The correct Answer is:
A
The balanced chemical reaction is :
`2MnO_(4)^(-) + 5SO_(3)^(2-) + 6H^(+) rarr 2Mn^(2+) + 5SO_(4)^(2-) + 3H_(2)O`
`because` 5 moles `SO_(3)^(2-)` reacts with 2 moles of `KMnO_(4)`
`:.` 1 mole of `SO_(3)^(2-)` will reacts with `(2)/(5)` mole `KMnO_(4)`.
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