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Which one of the following compounds can...

Which one of the following compounds can decolourise `KMnO_(4)` solution?

A

`SO_(4)^(2-)`

B

`S^(2-)`

C

`NO_(3)^(-)`

D

`CH_(3)CO O^(-)`

Text Solution

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The correct Answer is:
B
`2KMnO_(4) + 3H_(2)SO_(4) + 5H_(2)S to K_(2)SO_(4 ) + 2MnSO_(4) + 8H_(2)O + 5S`
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