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STD 11 - 9. Hydricarbon — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 9. Hydricarbon4 Marks
MCQ
The reaction $C{H_2} = CH - C{H_3} + HBr \to C{H_3}CHBr - C{H_3}$ is
  • A
    Nucleophilic addition
  • ✓
    Electrophilic addition
  • C
    Electrophilic substitution
  • D
    Free radical addition
✓

Answer

Correct option: B.
Electrophilic addition
b
In this reaction, $HBr$ undergoes heterolytic fission as

$HBr \rightarrow H ^{+}+ Br ^{-}$

Therefore, this reaction show electrophilic addition reaction.

$CH _2= CH - CH _3+ HBr \longrightarrow CH _3-\stackrel{\oplus}{ C } H - CH _3 \stackrel{ Br ^{-}}{\longrightarrow} CH _3- CHBr - CH _3$

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