NO2 gas evolves on thermal decomposition of which of the following compound(s)? — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Identify the state of reactants. Mercuric nitrate, Hg(NO3)2, is a soluble salt in aqueous solution. Step 2: Analyze the reaction with ammonia. Aqueous ammonia reacts with mercuric nitrate to form a white precipitate of basic mercuric amidonitrate, HgO.HgNH2NO3↓. Step 3: Since a solid precipitate is formed from a clear solution, this is a precipitate formation reaction (type A). Thus, the correct option is (a).