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Question

The number of moles of KMnO4 that will be needed to react with 1 mol of sulphite ion (SO23) in acidic solution is:

A
25
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B
35
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C
45
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D
1
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Solution

The correct option is A 25
As we know,
Equivalents of MnO4= Equivalents of SO23(SO23SO24+2e)
(n=5) (n=2)
1 Eq. = 1 Eq.
15 mol =12 mol
25 mol of MnO4=1 mol of SO23

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