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  4. By passing H2S gas in acidified KMnO4 . solution, we get

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Q. By passing $ H_{2}S $ gas in acidified $ KMnO_{4} $. solution, we get

Chhattisgarh PMTChhattisgarh PMT 2005

Solution:

Reduction of $K MnO _{4}$ in acidic solution
$2 KMnO _{4}+3 H _{2} SO _{4}+5 H _{2} S \rightarrow K _{2} SO _{4}+2 MnSO _{4}+8 H _{2} O +5 S$
So, by passing $H _{2} S$ gas in acidified $KMnO _{4}$ solution we get sulphur.