JEE Main Chemistry question

ChemistryHydrocarbonsJEE Main

Which of the following reactions will give an alkyne?

Answer: (D)

Solution

All three routes converge on propyne. (A): Zn removes both pairs of vicinal bromines from the 1,1,2,2-tetrabromide by double dehalogenation, directly giving CHCCH. (B): alc. KOH first eliminates one HBr to give a

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Question ID VK-142389