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Why is the peroxide effect or Kharash reaction not observed in the addition of HCl and HI to unsymmetrical alkenes?

Options

  1. AHCl and HI are stronger acids.
  2. BHCl and HI bonds are stronger than HBr.
  3. CHCl and HI do not form free radicals.
  4. DHCl and HI are less available in chemical reactions.

Correct answer

B. HCl and HI bonds are stronger than HBr.

Step-by-step solution

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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