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  4. In presence of acidic medium, KMnO4 converts H2S into

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Q. In presence of acidic medium, $KMnO_4$ converts $H_2S$ into

AIIMSAIIMS 2014The d-and f-Block Elements

Solution:

Acidified $KMnO_4$ oxidises $H_2S$ to $S$ only.
$2KMnO_4 + 3H_2SO_4 + 5H_2S \rightarrow K_2SO_4 + 2MnSO_4 + 5S + 8H_2O$