JEE Main Chemistry question

How many asymmetric carbon atoms are present in (i) 1,2-dimethylcyclohexane, (ii) methylcyclopentane, and (iii) 3-methylcyclohexene?

(A)Two, one, one
(B)One, one, one
(C)Two, none, two
(D)Two, none, oneCorrect

Answer: (D)

Solution

(i) Both ring carbons bearing a methyl group in 1,2-dimethylcyclohexane have two distinguishable ring paths (one toward, one away from the other methyl) — 2 stereocenters. (ii) In plain methylcyclopentane, the ring-carbon bearing the single

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Question ID VK-139196