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9. Hydricarbon — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
The alkene that will give the same product with $HBr$ in the absence as well as in the presence of peroxide is
  • ✓
    $2-$ butene
  • B
    $1-$ butene
  • C
    propene
  • D
    $1-$ hexene
✓

Answer

Correct option: A.
$2-$ butene
a
The addition of $HBr$ takes place according to anti-Markovnikoff’s rule in presence of peroxide for unsymmetrical alkenes. The addition of $HBr$ to symmetrical alkenes is not affected by the presence or absence of peroxide.

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