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Question: Which of the following is correct representation of reaction of acidified permanganate solution with...

Which of the following is correct representation of reaction of acidified permanganate solution with sulphurous acid?

A

2MnO4−+5SO32−+6H+→5SO42−+2Mn2++3H2O2MnO_{4}^{-} + 5SO_{3}^{2 -} + 6H^{+} \rightarrow 5SO_{4}^{2 -} + 2Mn^{2 +} + 3H_{2}O

B

MnO4−+SO32−+2H2O→S+Mn2++4H+MnO_{4}^{-} + SO_{3}^{2 -} + 2H_{2}O \rightarrow S + Mn^{2 +} + 4H^{+}

C

2MnO4−+5SO32−+2H2O→4SO42−+S+2Mn2++4H+2MnO_{4}^{-} + 5SO_{3}^{2 -} + 2H_{2}O \rightarrow 4SO_{4}^{2 -} + S + 2Mn^{2 +} + 4H^{+}

D

3MnO4−+2SO32−+2H2O→2S+3Mn2++4H+3MnO_{4}^{-} + 2SO_{3}^{2 -} + 2H_{2}O \rightarrow 2S + 3Mn^{2 +} + 4H^{+}

Answer

2MnO4−+5SO32−+6H+→5SO42−+2Mn2++3H2O2MnO_{4}^{-} + 5SO_{3}^{2 -} + 6H^{+} \rightarrow 5SO_{4}^{2 -} + 2Mn^{2 +} + 3H_{2}O

Explanation

Solution

Sulphurous acid or sulphite is oxidized to sulphate or sulphuric acid.

5SO32−+2MnO4−+6H+→2Mn2++3H2O+5SO42−5SO_{3}^{2 -} + 2MnO_{4}^{-} + 6H^{+} \rightarrow 2Mn^{2 +} + 3H_{2}O + 5SO_{4}^{2 -}