When carbon dioxide is passed through lime water, it turns milky due to the formation of .

C a C O_{3}

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C a O

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C a (H C O_{3})_{2}

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Solution

The correct option is A $C a C O_{3}$
On passing $C O_{2}$ through lime water, a milky-white precipitate of calcium carbonate is formed.
$C a (O H)_{2} (a q) + C O_{2} (g) \to$
$C a C O_{3} (↓) + H_{2} O (l)$

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Lime water turns milky when carbon dioxide gas is passed through it due to the formation of _________.

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