MolSynapsequestion bank
MolSynapse / Question bank / Organic Reaction Mechanisms II: Electrophilic and Radical Reactions / Electrophilic addition to alkenes and Markovnikov rule
JEE Main levelSingle correct optionDifficulty 2 of 3o2018

Propene is treated with HCl in the presence of benzoyl peroxide. The major product is

  1. A2-chloropropane
  2. B3-chloropropene
  3. C1,2-dichloropropane
  4. D1-chloropropane

Answer: A

The peroxide effect does not operate for HCl because the chain-propagating step (H abstraction from the strong H-Cl bond by the alkyl radical) is unfavourable. The ionic Markovnikov addition therefore takes place, giving 2-chloropropane.
Practice Organic Reaction Mechanisms II: Electrophilic and Radical Reactions More on Electrophilic addition to alkenes and Markovnikov rule
Previous questionNext question

More questions on Electrophilic addition to alkenes and Markovnikov rule