SO_{2} is a strong reducing agent; however,it | vedclass

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(C) $SO_{2}$ acts as an oxidising agent when it reacts with stronger reducing agents like $H_{2}S$.The reaction is: $SO_{2} + 2H_{2}S \longrightarrow

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Reaction with $H_{2}S$ to give sulphur

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(C) $SO_{2}$ acts as an oxidising agent when it reacts with stronger reducing agents like $H_{2}S$.The reaction is: $SO_{2} + 2H_{2}S \longrightarrow 3S + 2H_{2}O$.In this reaction,the oxidation state of $S$ in $SO_{2}$ decreases from $+4$ to $0$,indicating that it acts as an oxidising agent.Other options like decolourising $KMnO_{4}$ or turning dichromate paper green demonstrate the reducing nature of $SO_{2}$ where it gets oxidised to $SO_{4}^{2-}$.

$SO_{2}$ is a strong reducing agent; however,it can also act as an oxidising agent. Which of the following shows its oxidising nature?

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