Give reasons for the following:
Lime water turns milky when it comes in contact with air.

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Solution

Lime water is the aqueous form of calcium hydroxide [Ca(OH)₂]. When it is exposed to air, it turns into milky due to the formation of calcium carbonate(CaCO₃). This is because air contains carbon dioxide.

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Answer in brief.

Why does lime water turn milky when it comes in contact with air?

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

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

C O_{2}

A solution of _______ when reacts with crushed egg-shells, it gives a gas that turns lime-water milky.

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