The modern theory of aromaticity was advanced by E. Huckel : Explain Huckel's rule of aromaticity.

The modern theory of aromaticity was advanced by E. Huckel : Give one example of heterocyclic aromatic compound and two examples of cyclic icons which are aromatic

Explain why the following systems are not aromatic?

Explain why the following systems are not aromatic?

Explain why the following systems are not aromatic?

Naphthalene is an aromatic compound. Explain its aromaticity using Huckel's rule.

Explain why the follwing system is not aromatic:

State whether the following statements are true or false. a. In benzene, carbon uses all the three p obitals for hybridisation. b. Ácetylene is a tetrahedral molecule. c. Branched chain alkanes, alkenes and aromatic hydrocarbons have high octane numbers. d. Ethyne can be distinguished from ethene by using cold dilute KMnO_4^- e. In cracking, the larger molecule are broken down into smaller molecules and in reforming, cyclic and acyclic alkanes are converted into arenes.