**(A):** acts as a bleaching agent in the presence of moisture. <br> **(R):** The bleaching action o — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

**Assertion:** $SO_2 + 2H_2O \rightarrow H_2SO_4 + 2[H]$. Nascent hydrogen reduces coloring matter. [10], [11] <br>**Reason:** Atmospheric oxygen eventually re-oxidizes the bleached material, making the effect temporary, unlike the permanent bleaching of $Cl_2$ (oxidation). [11]