Which gas turns limewater milky when bubbled through it?

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Multiple Choice

Which gas turns limewater milky when bubbled through it?

Explanation:
Limewater is calcium hydroxide solution, and carbon dioxide dissolves in it to form an insoluble solid, calcium carbonate. This CaCO3 precipitates as tiny particles, which scatter light and turn the solution milky. The reaction can be written as CO2 + Ca(OH)2 → CaCO3(s) + H2O. Other gases like hydrogen, oxygen, or nitrogen don’t form this solid with limewater, so the liquid remains clear.

Limewater is calcium hydroxide solution, and carbon dioxide dissolves in it to form an insoluble solid, calcium carbonate. This CaCO3 precipitates as tiny particles, which scatter light and turn the solution milky. The reaction can be written as CO2 + Ca(OH)2 → CaCO3(s) + H2O. Other gases like hydrogen, oxygen, or nitrogen don’t form this solid with limewater, so the liquid remains clear.

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