Question

$S+O{H}^{-}\to S^{2-}+S_2{O}_3^{2-}$ is an example of

• A. disproportionation reaction
• B. displacement reaction
• C. chemical combination reaction
• D. decomposition reaction

Answer 1

The correct option is A disproportionation reaction

The reaction between sulphur and hydroxide ion is a disproportionation reaction. In this reaction, the oxidation state of sulphur changes from $0$ to $-2$ and $+2$. S is oxidized to $S_2{O}_3^{2-}$ ion and simultaneously, it is reduced to sulphide ion.