KEAM 2019 Physics and Chemistry Paper

The compounds pyridine and planar cyclooctatetraene are aromatic and anti-aromatic respectively. For a compound to be aromatic, it must be cyclic, planar. It must contain (4n+2)π electrons, where n is any whole number. Antiaromatic compounds are cyclic compounds with a π electron system that has higher energy due to the presence of 4n delocalized electrons in it.