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NEET Sample Paper NEET Sample Test Paper-18

  • question_answer
    When subjected to acid catalysed hydration, the order of reactivity of the alkenes; \[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}(I), C{{H}_{3}}CH=C{{H}_{2}}(II),\] and \[C{{H}_{2}}=C{{H}_{2}}\,(III)\] is 

    A)  I > III > II                  

    B)  III > II > I

    C)  II > I > III                  

    D)  I > II > III

    Correct Answer: D

    Solution :

    As the acid catalysed hydration ofalkenes affords the formation of the carbocation intermediate. So the order of reactivity is \[\underset{\text{I}}{\mathop{{{(C{{H}_{3}})}_{2}}C}}\,=C{{H}_{2}}>\underset{\text{II}}{\mathop{C{{H}_{3}}CH=C{{H}_{2}}}}\,>\underset{\text{III}}{\mathop{C{{H}_{2}}=C{{H}_{2}}}}\,\] Hence the correct option is [d].


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