Question

Which of the following is not the correct condition for resonance?

• A. The positions of all the atomic nuclei in the resonating structures are not the same.
• B. The resonating structures must have the same number of unpaired or paired electrons.
• C. The molecules exhibiting resonance must be planar in nature.
• D. The resonating structures must have nearly the same energies.

Answer 1

The correct option is A The positions of all the atomic nuclei in the resonating structures are not the same.

All resonating structures must have the same arrangement of atomic nuclei.

The resonating structures must have the same number of unpaired or paired electrons. However, they differ in the way of electron distribution.

The resonating structures must be planar in structure.

The different resonating structures should have the same or nearly the same energies.

Hence, the correct answer is option A.