MHT CET 2025 Chemistry question

Identify product 'B' in the following sequence of reactions.

1, 2 Dibromoethane A B

(A)Bromoethane
(B)Bromoethene
(C)Ethene
(D)EthyneCorrect

Answer: (D)

Solution

Step 1: 1,2-Dibromoethane () with alcoholic KOH undergoes dehydrohalogenation (loss of one HBr) to give A = bromoethene (). Step 2: bromoethene is a vinylic halide; with the strong base sodamide () it loses a second HBr to give B = ethyne ($HC

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Question ID VK-102523