Hydrocarbons: RE-NEET 2026

Hard· Chemical Reaction of Alkenes (By KMnO₄)· +4 / −1
Given below are two statements : Statement I : transtrans-But-2-ene upon treatment with Br2\mathrm{Br_2} in CCl4\mathrm{CCl_4} gives the product shown as the first Newman projection (viewed along the C2-C3 bond): front carbon with Br\mathrm{Br} (down), H\mathrm{H} (upper left), Me\mathrm{Me} (upper right); rear carbon with Br\mathrm{Br} (up), H\mathrm{H} (lower left), Me\mathrm{Me} (lower right). Statement II : ciscis-But-2-ene upon treatment with alkaline KMnO4\mathrm{KMnO_4} gives the product shown as the second Newman projection: front carbon with Me\mathrm{Me} (down), H\mathrm{H} (upper left), OH\mathrm{OH} (upper right); rear carbon with OH\mathrm{OH} (up), H\mathrm{H} (lower left), Me\mathrm{Me} (lower right). Question diagram In the light of the above statements, choose the most appropriate answer from the options given below.
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