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JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Critical Thinking Aldehydes,

  • question_answer
    The appropriate reagent for the transformation [IIT-JEE (Screening) 2000]

    A)                 \[Zn(Hg),\,HCl\]               

    B)                 \[N{{H}_{2}}N{{H}_{2}}O{{H}^{-}}\]

    C)                 \[{{H}_{2}}/Ni\]               

    D)                 \[NaB{{H}_{4}}\]

    Correct Answer: B

    Solution :

                    Both \[Zn(Hg),\,HCl\] and \[N{{H}_{2}}N{{H}_{2}},\,\,O{{H}^{-}}\] can reduce \[-COC{{H}_{3}}\] group to \[-C{{H}_{2}}-C{{H}_{3}}\] group, but HCl will also bring about dehydration of alcohol to form alkene. Therefore, appropriate reagent for the conversion is \[N{{H}_{2}}N{{H}_{2}},\,\,O{{H}^{-}}\].


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