A) 2-butene
B) 1-butene
C) propene
D) 1-hexene
E) 2-methylpropene
Correct Answer: A
Solution :
The addition of\[HBr\]to symmetrical alkenes is not affected by the presence or absence of peroxide. \[\underset{2-butene}{\mathop{C{{H}_{3}}-CH=CH-C{{H}_{3}}}}\,\xrightarrow[{}]{HBr/peroxide}\] \[\underset{2-bromobutane}{\mathop{C{{H}_{3}}C{{H}_{2}}\underset{\begin{smallmatrix} | \\ Br \end{smallmatrix}}{\mathop{CH}}\,C{{H}_{3}}}}\,\]
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