Why only carbon dioxide gas turns lime water milky? why cannot any other gas like oxygen turn lime water milky?

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Solution

Carbon dioxide turns lime water milky due to formation of calcium carbonate which is insoluble in water and thus forms a milky white precipitate.
$C O_{2} + C a (O H)_{2} \to C a C O_{3} + H_{2} O l i m e w a t e r w h i t e p p t .$

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Similar questions

Why lime water turns milky when it gets exposed to carbon dioxide?

Statement 1- Lime water turns milky when air is passed through the solution.

Statement 2- Air contains carbon dioxide which turns lime water milky.

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