After drawing the correct Lewis dot structure(s) of bicarbonate ion (or hydrogen bicarbonate), there are :

three single bonds around the central carbon atom

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four single bonds around the central carbon atom

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two equivalent resonance forms

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three equivalent resonance forms

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Solution

The correct option is C two equivalent resonance forms
The two resonance forms of bicarbonate ion can be drawn as shown.

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Question 27

Which of the following statement are correct about $C O_{3}^{- 2}$ ?

(a) The hybridisation of central atom is $s p^{3}$

(b) Its resonance structure has one C - O single bond and two C = 0 double bonds

(d) All C - O bond lengths are equal

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