Home › MCQs › EEJ MAIN Chemistry › Question #7131
Back to Questions
EEJ MAIN Chemistry QUESTION #7131
Question 1
Identify the major product obtained when propene reacts with $HBr$ in the presence of organic peroxides.
  • $1$-bromopropane✔️
  • $2$-bromopropane
  • $1,2$-dibromopropane
  • $2$-bromoprop-1-ene
Correct Answer Explanation
While the addition of $HBr$ to propene normally follows Markovnikov's rule (yielding 2-bromopropane), the presence of peroxides triggers the Kharasch effect (Anti-Markovnikov addition). In this free-radical mechanism, the bromine atom attaches to the terminal carbon, resulting in $1$-bromopropane as the major product.