In the resonance hybrid of an ozone $(O_3)$ molecule, the $O-O$ bond length is: (in $pm$)

Resonance is $\underline{\text{NOT}}$ exhibited by

In the $HCOO^{-}$ anion,the two carbon-oxygen bonds are found to be of equal length. What is the reason for this?

With respect to resonance structures of $CO_3^{2-}$ ion, which of the following statements are correct?
$(a)$ All $C – O$ bonds in $CO_3^{2-}$ are equivalent
$(b)$ There are three resonance structures possible for $CO_3^{2-}$ ion
$(c)$ The position of carbon and oxygen should change in every resonance structure
$(d)$ The formal charge on carbon atom is $0$

Identify the correct statement.

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is