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  4. In the chemical reaction Cl2 + H2S → 2HCl + S, the oxidation number of sulphur changes from

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Q. In the chemical reaction $Cl_{2} + H_{2}S \to 2HCl + S,$ the oxidation number of sulphur changes from

Redox Reactions

Solution:

Oxidation state of sulphur in $H_{2}S$ is $-2$, while it is zero in ‘S’, i.e., in this reaction oxidation of sulphur and reduction of chlorine is takes place.