MHT CET 2025 Chemistry question

Which of the following forms 2-Methylbut-2-ene on heating with concentrated sulphuric acid?

(A)Butan-2-ol
(B)2-Methyl-2-propanol
(C)2-Methylbutan-1-ol
(D)2-Methylbutan-2-olCorrect

Answer: (D)

Solution

Acid-catalysed dehydration of an alcohol removes water to form an alkene (E1 mechanism, Saytzeff rule: the more substituted alkene is major). 2-Methylbutan-2-ol, , protonates and loses water to give the tertiary carbocation ; loss of from the

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Question ID VK-102847