Q. 27

In the following questions two or more options may be correct.

Which of the following statements are correct about CO₃^2- ?

A. The hybridisation of central atom is sp3.

B. Its resonance structure has one C–O single bond and two C=O double bonds.

C. The average formal charge on each oxygen atom is 0.67 units.

D. All C–O bond lengths are equal.

Answer :

The hybridization of Carbon atom is sp² in carbonate ion.

Carbonate ion is present in the form of a resonating structure. These structures are equivalenting to nature. Resonance all 3 C-O bonds get a double character in one of the resonating structures.

Thus, all the bonds are equivalent and have equal length.

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