Chemistry - GOC Question with Solution | TestHub

1 (Naphthalene): A bicyclic conjugated system containing $10\pi$ electrons, satisfying Hückel's rule ($4n+2$).

2 (B₃N₃H₆): Borazine (inorganic benzene) is cyclic, planar, and contains $6\pi$ electrons.

3 ((C₅H₅)₂Fe): Ferrocene consists of two cyclopentadienyl anions, each having an aromatic $6\pi$ electron system.

5 (Azulene): A fully conjugated bicyclic hydrocarbon with $10\pi$ electrons, making it highly aromatic.

9 (Squaric acid): Its resonance contributor has a dicationic 4-membered ring with $2\pi$ electrons, exhibiting strong aromatic character.