(D) Naphthalene consists of two fused benzene rings. It contains $5$ double bonds in its structure. Each double bond contributes $2$ $\pi$ electrons.

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(D) Naphthalene consists of two fused benzene rings. It contains $5$ double bonds in its structure. Each double bond contributes $2$ $\pi$ electrons. Therefore,the total number of $\pi$ electrons = $5 \times 2 = 10$ $\pi$ electrons. This satisfies $H$ückel's rule ($4n + 2 = 10$,where $n = 2$),confirming its aromatic nature.