JEE Main & Advanced Sample Paper JEE Main Sample Paper-40

  • question_answer
    The intermediate for mad during the addition of HCl to propene in the presence of peroxide is                    

    A) \[C{{H}_{3}}\overset{\bullet }{\mathop{C}}\,HC{{H}_{2}}Cl\] 

    B) \[C{{H}_{3}}\overset{\oplus }{\mathop{C}}\,HC{{H}_{3}}\]

    C) \[C{{H}_{3}}C{{H}_{2}}\overset{\bullet }{\mathop{C}}\,{{H}_{2}}\]

    D) \[C{{H}_{3}}C{{H}_{2}}\overset{\oplus }{\mathop{C}}\,{{H}_{2}}\]

    Correct Answer: B

    Solution :

    The reaction proceed through Markownikoff's rule by ionic mechanism. The initial carbonium ion \[(C{{H}_{3}}C{{H}_{2}}\overset{+}{\mathop{C}}\,{{H}_{2}})\] rearrange into more stable \[(C{{H}_{3}}\overset{+}{\mathop{C}}\,HC{{H}_{3}})\] carbonium ion.


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