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Pink colour of acidified KMnO(4) is deco...

Pink colour of acidified `KMnO_(4)` is decolourised but there is no evolution of any gas.This may happen with the compound containing the following acid radical.

A

`SO_(3)^(2-)`

B

`NO_(2)^(-)`

C

`S^(2-)`

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
D
`(A) 5SO_(3)^(2-)+2MnO_(4)^(-)+6H^(+) to 2Mn^(2+) +5SO_(4)^(2-) +3H_(2)O`
`(B) 2MnO_(4)^(-)+5NO_(2)^(-)+6H^(+) to 2Mn^(2+)+5NO_(3)^(-)+3H_(2)O`
`(C ) 2MnO_(4)^(-)+H_(2)S +6H^(+) to 2Mn^(2+) +5S darr +8H_(2)O`
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