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Question 770009
JEE Chemistry · Hard

Hydrocarbons: JEE Main MCQ

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JEE MainHardQuestion 770009

Question

The product of treating propene with HBr in presence of peroxides is:
  1. A
    1-bromopropane (anti-Markovnikov)
    Correct
  2. B
    2-bromopropane (Markovnikov)
  3. C
    Propane
  4. D
    Propyne

Correct answer

1-bromopropane (anti-Markovnikov)

Explanation

Peroxides initiate a free radical chain mechanism. Br• adds to the less substituted end of propene (more stable radical forms at C2). The result is anti-Markovnikov addition: Br goes to C1 → 1-bromopropane. This is the Kharasch effect (peroxide effect).

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