An alkene (A) with molecular formula C 7 H 12 adds HBr to give a single alkyl halide (B) (C 7 H 13 Br). (A) on catalytic hydrogenation gives 1,1-dimethyl cyclopentane.The alkene (A) is.

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So, there is a possibility of two double bonds or one double bond and one ring.

But the hydrogenation reaction of (A )shows that it contains one double bond and one ring . So,(d) is the only option which can give only one product with HBr.

Chemistry - Hydrocarbon Question with Solution | TestHub

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