Question

In the following reaction: \[ SO_2 + 2H_2S \rightarrow 3S + 2H_2O \] Which of the following statements is correct?

• A. Sulphur is reduced and oxygen is oxidised
• B. Sulphur is both oxidised and reduced
• C. Sulphur is oxidised and Hydrogen is reduced
• D. Hydrogen is oxidised and Sulphur is reduced

Hint:

In redox reactions, oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. When a substance both gains and loses electrons, it is both oxidised and reduced.

Answer 1

The Correct Option is B

In the reaction, \( SO_2 \) (sulfur dioxide) is reduced to sulfur \( S \), and \( H_2S \) (hydrogen sulfide) is oxidized to sulfur as well. - Sulfur in \( SO_2 \) goes from oxidation state \( +4 \) to \( 0 \) (reduction). - Sulfur in \( H_2S \) goes from oxidation state \( -2 \) to \( 0 \) (oxidation). Hence, sulfur is both reduced and oxidised in this reaction, making the correct answer (B).