In the following questions two or more options may be correct.
Which of the following statements are correct about CO32- ?
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.
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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