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(D) Benzene $(C_6H_6)$ is a highly stable aromatic compound due to the delocalization of $\pi$-electrons,a phenomenon known as resonance.Resonance ene

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Of resonance

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(D) Benzene $(C_6H_6)$ is a highly stable aromatic compound due to the delocalization of $\pi$-electrons,a phenomenon known as resonance.Resonance energy provides extra stability to the benzene ring.Addition reactions would involve breaking the aromatic sextet and destroying the resonance stability,which is energetically unfavorable.Substitution reactions,on the other hand,allow the benzene ring to retain its aromatic character and resonance stability,making them the preferred pathway for benzene.

Benzene undergoes substitution reaction more easily than addition because:

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