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Anti Markownikov rule or peroxide effect...

Anti Markownikov rule or peroxide effect applies to the addition of HBr only and not to the addition of HCI or HI give reason.

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Because peroxide initiated addition is run by free radical mechanism which involves following steps: i) Production of `X^@` by the attack of `RO^@ ` on HX. ii) Attack of `X^@ ` on alkene to produce stable alkyl free radical. Both the steps are exothermic in case of addition of HBr only. Hence peroxide effect applies to the addition of HBr only rather than HCl or HI.
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OMEGA PUBLICATION-HALOALKANES AND HALOARENES-MULTIPLE CHOICE QUESTIONS (MCQS)
  1. Anti Markownikov rule or peroxide effect applies to the addition of HB...

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  2. Ethyl alcohol gives ethyl chloride with the help of

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  3. CH3 -CH =CH2 +HI to X where X is

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  4. The reaction CH3 -CH =CH2 +HBr to CH3 - underset(Br) underse...

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  5. SN^1 reaction of alkylhalides leads to

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  6. Most reactive metal is:

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  7. The reactivity order of halides for dehydrohalogenation is

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  8. Mg reacts with RBr best in

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  9. Both methane and ethane can be prepared in single step by the use of

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  10. Alkyl halides react with Mg in dry ether to form

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  11. Which of the following metal can be used for carrying out Wurtz-Fittig...

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  12. Ethyl alcohol gives ethyl chloride with the help of

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  13. CH3 -CH =CH2 +HI to X where X is

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  14. The reaction CH3 -CH =CH2 +HBr to CH3 - underset(Br) underse...

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  15. SN^1 reaction of alkylhalides leads to

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  16. Most reactive halide towards SNI reaction is

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  17. The reactivity order of halides for dehydrohalogenation is

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  18. Mg reacts with RBr best in

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  19. Both methane and ethane can be prepared in single step by the use of

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  20. Alkyl halides react with Mg in dry ether to form

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  21. Which of the following metal can be used for carrying out Wurtz-Fittig...

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