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

💡 Solution & Explanation

In the reaction with HI, Sulphur is reduced from +6 in $H_2SO_4$ to +4 in $SO_2$, while Iodine is oxidised from -1 to 0 in $I_2$. Thus, $H_2SO_4$ acts as an oxidising agent.