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AP EAMCET202316 May 2023Evening ShiftChemistryHaloalkanes and HaloarenesActual

Among the following organic halides in the increasing order of their dehydrohalogenation reactions in the presence of alcoholic KOH CH ₃ CH ₂ Br (A) CH ₃ CH ₂ CH ₂ Br (B) CH ₃ CH ( Br ) CH ₃ (C) ( CH ₃ )₃ CBr (D)

Options

  1. AA < B < C < D
  2. BD < B < C < A
  3. CA < C < B < D
  4. DB < A < C < D

Correct answer

A. A < B < C < D

Step-by-step solution

The elimination reaction (dehydrohalogenation) is favoured by those substrates that form a more stable carbocation intermediate. Thus, the order of reactivity will be :-

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