Ca(OH)2 + CO2 -> CaCO3↓ + H2O — Redox Reactions and Volumetric Analysis Chemistry Question

💡 Solution & Explanation

Step 1: Aqueous calcium hydroxide (limewater) is a clear solution. Step 2: When carbon dioxide gas (CO2) is bubbled through it, they react to form insoluble calcium carbonate (CaCO3↓), making the solution turbid or milky. Step 3: Because a precipitate is formed from soluble reactants, this is a precipitate formation reaction (type A), corresponding to option (a).