What happens when carbon dioxide gas is passed through lime water.

calcium hydroxide is formed.

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white precipitate of CaO is formed.

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white precipitate of $C a C O_{3}$ is formed.

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colour of lime water disappears.

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Solution

The correct option is C
white precipitate of $C a C O_{3}$ is formed.

When $C O_{2}$ is passed through lime water, a white precipitate of $C a C O_{3}$ is formed, which turns lime water milky.
$C a (O H)_{2} + C O_{2} \to C a C O_{3} ↓ + H_{2} O$

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