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Oxidation and Reduction

Identify the ...

Question

Identify the compounds oxidised and reduced in the following reaction: H₂S + Cl₂ → 2HCl + S

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Solution

H₂S + Cl₂ → 2HCl + S
Hydrogen sulphide Chlorine Hydrochloric acid Sulphur
Here oxidation state of S in H₂S is -2 and that of Cl in Cl₂ is 0 at reactant side but oxidation state of Cl in HCl is -1 and that of S in S is 0.
So, we can say that H₂S is getting oxidised since its oxidation number is increasing and Cl₂ is getting reduced since its oxidation number is decreasing.

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