The molecule which is Non - Aromatic is

Which of the following is non - aromatic in nature ?

The chemical system that is non - aromatic is

Which of the following compound is non aromatic :

Select from the following molecules or ions which is/are aromatic?

Resonance energy will be more if (a) canonical structures are equivalent than if canonical structures are non-equivalent. (b) molecule is aromatic than if molecule is not aromatic.