The correct order for the rate of $\alpha, \beta$-dehydrohalogenation for the following compounds is

• A

  (iii) $ < $ (ii) $ < $ (i)
• Correct answer
  B

  (ii) < (iii) < (i)
• C

  (i) $ < $ (ii) $ < $ (iii)
• D

  (ii) $ < $ (i) $ < $ (iii)

Solution

- More is the stability of alkene formed, more will be the rate of $\alpha-\beta$ dehydrohalogenation

Hence, the correct answer is option: 'B'.