Sequence of resonating structures will be:

Choose the correct answer from the options given below:

(D), (C),(A), (B), (E)

The correct answer is option 3. (D), (C),(A), (B), (E).

Resonance form or structure of any molecule is known to be used when a single Lewis structure cannot describe the molecule accurately. It can be used in the case of polyatomic ions. The resonating structures are of no real existence, as any molecule cannot exist for more than a fraction of time.

Resonance structures contain the same number of bonding, and non bonding electrons as in the Lewis structure. The resonance structures have the same energy and, same position of nuclei. The resonance structures show the shifting of electrons, and can be seen in compounds containing double bonds. More the number of resonating structures a molecule has, the more stable the molecule is considered.

Resonance can be explained by the fact that delocalization of electrons in a compound, results in various canonical forms of a molecule.

The resonance of an ether group attached with a benzene ring is shown, and the ortho and para positions getting a partial negative charge is shown. This increases the reactivity of these positions.

Hence, a resonance structure is a structure that has canonical forms of the Lewis structure showing delocalization of electrons in a molecule.