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What does carbon dioxide gas do to lime water?

Answer and explanation

Correct answer: Milky

Lime water is a clear solution of calcium hydroxide, Ca(OH)₂. When carbon dioxide is passed through it, the reaction Ca(OH)₂ + CO₂ → CaCO₃ + H₂O occurs. The calcium carbonate formed is insoluble and appears as a white suspension, making the lime water milky. Therefore option A is correct. The red, blue, and black changes are not the characteristic result of this carbon-dioxide test.

Related tags

Carbon DioxideLime WaterCalcium CarbonateAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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