The chemical formula of limestone is:-

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

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$C a O$

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$C a C O_{3}$

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$C a (O H)_{2}$

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Solution

The correct option is C
$C a C O_{3}$

The chemical formula of limestone, chalk, marble etc. is $C a C O_{3}$ and it is a carbonic salt of calcium.

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