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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2003

  • question_answer
    The order of reactivities of methyl halides in the formation of Grignard reagent is :

    A)  \[C{{H}_{3}}>C{{H}_{3}}Br>C{{H}_{3}}Cl\]

    B)  \[C{{H}_{3}}Cl>C{{H}_{3}}Br>C{{H}_{3}}I\]

    C)  \[C{{H}_{3}}Br>C{{H}_{3}}CI>C{{H}_{3}}I\]

    D)                  \[C{{H}_{3}}Br>C{{H}_{3}}I>C{{H}_{3}}Cl\]

    Correct Answer: A

    Solution :

    Among alkyl hallides, iodides are least stable, hence these form Grignard reagent easily. Hence, the correct order of reactivity in formation of Grignard reagent is \[C{{H}_{3}}I>C{{H}_{3}}Br>C{{H}_{3}}Cl\]


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