Which of the following statements are correct about CO{_{3}}^{2-}?

(i) The hybridization of central atom is sp3.
(ii) Its resonance structure has one C–O single bond and two C=O double bonds.
(iii) The average formal charge on each oxygen atom is 0.67 units.
(iv) All C–O bond lengths are equal.

Answers (1)

The answer is the option (iii) The average formal charge on each oxygen atom is 0.67 units and (iv) All C-O bond lengths are equal.

Explanation: In resonating, structures bonds are not fixed, and as a result, all bond lengths are equal.

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