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Question: Answered & Verified by Expert
Why is the peroxide effect or Kharash reaction not observed in the addition of HCl and HI to unsymmetrical alkenes?
ChemistryHydrocarbonsNEET
Options:
  • A HCl and HI are stronger acids.
  • B HCl and HI bonds are stronger than HBr.
  • C HCl and HI do not form free radicals.
  • D HCl and HI are less available in chemical reactions.
Solution:
2157 Upvotes Verified Answer
The correct answer is: HCl and HI bonds are stronger than HBr.
The peroxide effect is not observed in the addition of HCl and HI to unsymmetrical alkenes because HCl and HI have stronger bonds compared to HBr, making them less susceptible to free radical cleavage.

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