When carbon dioxide is passed for a long time into a suspension of $C a C O_{3}$ in water, the product formed is:

C a C_{2}

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

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C a H C O_{3}

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

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Solution

The correct option is A $C a (H C O_{3})_{2}$
Calcium carbonate reacts with carbon dioxide in presence of water to form calcium hydrogen carbonate.
$C a C O_{3} + H_{2} O + C O_{2} \to C a (H C O_{3})_{2}$

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