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The ease of dehydrohalogenation of alkyl halide with alcoholic ( KOH ) is

Options

  1. A(3^ < 2^ < 1^ )
  2. B(3^ > 2^ > 1^ )
  3. C(3^ < 2^ > 1^ )
  4. D(3^ > 2^ < 1^ )

Correct answer

B. (3^ > 2^ > 1^ )

Step-by-step solution

Hints : Such dehydrohalogenation follows ( E ₂ ) mechanism. The driving force of such reactions is the stability of alkene produced. Since tetriary alkyl halide can give more substituted alkene, it reacts fastest followed by secondary and primary i.e. (3^ > 2^ > 1^ ).

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