JEE Main & Advanced Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank Preparation of alcohol Phenol and Ethers

  • question_answer
    \[{{C}_{2}}{{H}_{5}}MgI\] reacts with HCHO to form last product [MP PMT 1991]

    A)                 \[C{{H}_{3}}CHO\]          

    B)                 \[{{C}_{3}}{{H}_{7}}OH\]

    C)                 \[C{{H}_{3}}COC{{H}_{3}}\]        

    D)                 \[C{{H}_{3}}COOC{{H}_{3}}\]

    Correct Answer: B

    Solution :

               \[\begin{matrix}    H  \\    H  \\ \end{matrix}>C=O+{{C}_{2}}{{H}_{5}}MgI\to \underset{\underset{{{C}_{2}}{{H}_{5}}}{\mathop{|\,\,\,\,\,\,\,\,\,}}\,\,\,}{\mathop{C{{H}_{2}}-}}\,O-MgI\]                 \[\xrightarrow{\text{Hydrolysis}}{{C}_{2}}{{H}_{5}}-C{{H}_{2}}-OH\] or \[{{\text{C}}_{\text{3}}}{{H}_{7}}OH+Mg<\begin{matrix}    I\,\,\,\,  \\    OH  \\ \end{matrix}\]


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