Limewater is a saturated aqueous solution of calcium hydroxide, Ca(OH)₂. When carbon dioxide (CO₂) gas is passed through limewater, it reacts with calcium hydroxide to form insoluble calcium carbonate (CaCO₃), which precipitates out of the solution, causing it to appear cloudy or milky. The chemical reaction is: Ca(OH)₂(aq) + CO₂(g) → CaCO₃(s) + H₂O(l).
Limewater is turned milky by
Asked in BPSC Prelims Exam 66th · Topic: Acid, Base and Salt (Reactions of Acids and Bases (Neutralization, reaction with metals, metal carbonates/bicarbonates))
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