BCECE Engineering BCECE Engineering Solved Paper-2005

  • question_answer
    Alkyl halide can be converted into alkene by:

    A) nucleophilic substitution reaction

    B) elimination reaction

    C) both nucleophilic  substitution  and elimination reaction

    D) rearrangement

    Correct Answer: B

    Solution :

    Key Idea: \[R-C{{H}_{2}}-C{{H}_{2}}X+KOH(alc)\xrightarrow{{}}\] \[R-CH=C{{H}_{2}}+KX+{{H}_{2}}O\] Alkyl halide undergo \[\beta -\]elimination to form alkene \[\therefore \] Elimination reaction is correct choice. (i) Nudeophilic substitution reaction is used to convert alcohol into alkyl halide.   (ii) In rearrangement reaction one molecule changes into other via internal changes.


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