Carbonate and bicarbonate ions are:

C O_{2}^{3 -}

and

H C O_{2}^{-}

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H C O_{2}^{-}

and

C O_{2}^{3 -}

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H C O_{3}^{-}

and

C O_{3}^{2 -}

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C O_{3}^{2 -}

and

H C O_{3}^{-}

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Solution

The correct option is B $C O_{3}^{2 -}$ and $H C O_{3}^{-}$
Carbonates and bicarbonates are the salts of carbonic acid.

These anions are formed from carbonic acid, $H_{2} C O_{3}$ by removing $H^{+}$ ions successively.Their shapes are $t r i g o n a l$ $p l a n a r$ and central carbon atom undergoes $s p^{2}$ hybridization.

Hence, the correct option is $D$

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