3. Which of the following chemical reactions definitively depicts the oxidising behaviour of ? — Electrochemistry Chemistry Question

💡 Solution & Explanation

In the reaction with HI, the sulfur in $H_2SO_4$ (oxidation state +6) is reduced to $SO_2$ (+4), while iodide (-1) is oxidized to $I_2$ (0). This demonstrates $H_2SO_4$ acting as an oxidizing agent.