Taking into account hybridization and resonance effects,rank the following $C-O$ bonds in order of decreasing bond length. The structure provided is the carbonate ion $(CO_3^{2-})$.

Point out the incorrect statement about resonance.

Comment on the nature of two $S-O$ bonds formed in $SO_{2}$ molecule. Are the two $S-O$ bonds in this molecule equal?

The $C-O$ bond length in $CO$,$CO_2$ and $CO_3^{2-}$ follows the order.

Which of the following statements is correct about $CO_3^{2-}$ ?
$A$. The hybridisation of the central atom is $sp^3$.
$B$. 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.

In a benzene molecule,all $C-C$ bond lengths are equal because: