JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    Which reactions are most common in alkenes [Pb. CET 1989]

    A) Electrophilic substitution reactions

    B) Nucleophilic substitution reactions

    C) Electrophilic addition reactions

    D) Nucleophilic addition reactions

    Correct Answer: C

    Solution :

    Electrophillic addition reactions are shown by alkenes or alkynes in these reactions attacking species is electrophiles \[C{{H}_{3}}-CH=C{{H}_{2}}+{{H}^{+}}\xrightarrow{\text{Slow}}\underset{{{2}^{o}}\text{ carbonium ion}}{\mathop{C{{H}_{3}}-\overset{+}{\mathop{C}}\,H-C{{H}_{3}}}}\,\] \[C{{H}_{3}}-\overset{+}{\mathop{C}}\,H-C{{H}_{3}}+B{{r}^{-}}\xrightarrow{\text{Fast}}\underset{\text{2-Bromo propane}}{\mathop{C{{H}_{3}}-\underset{Br}{\mathop{\underset{|}{\mathop{C}}\,H}}\,-C{{H}_{3}}}}\,\]


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