JEE Main Chemistry question

Which of the following drawn structures does **not** represent a chemically reasonable structure for a dimethylbenzene (xylene) isomer?

(A)The 1,2-dimethyl (*ortho*) arrangement
(B)A second, independently-drawn 1,2-dimethyl arrangement (identical to (A), not a new isomer)
(C)The 1,3-dimethyl (*meta*) arrangement
(D)A drawing with the two methyl substituents shown crossing to opposite faces of the planar ringCorrect

Answer: (D)

Solution

Benzene's ring carbons are sp² and the ring is planar, so substituents are simply attached in the ring plane — there is no "above/below the ring face" distinction (no

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Question ID VK-140177