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

  • question_answer
    The reagent used for the preparation of higher ether from halogenated ethers is             [Tamil Nadu CET 2001]

    A)                 conc. \[{{H}_{2}}S{{O}_{4}}\]     

    B)                 Sodium alkoxide

    C)                 Dry silver oxide

    D)                 Grignard reagent

    Correct Answer: D

    Solution :

               \[\underset{\begin{smallmatrix}  \text{Methoxymethane} \\  \,\,\,\text{(Lower}\,\text{ether)} \end{smallmatrix}}{\mathop{C{{H}_{3}}OC{{H}_{3}}}}\,\xrightarrow{C{{l}_{2}}/hv}\underset{\alpha -\text{Chlorodimethyl}\,\text{ether}}{\mathop{C{{H}_{3}}OC{{H}_{2}}Cl}}\,\]\[\underset{-MgBr(Cl)}{\mathop{\xrightarrow{C{{H}_{3}}MgBr}}}\,\underset{\begin{smallmatrix}  \text{Methoxyethane} \\  \,\,\text{(Higher}\,\text{ether)} \end{smallmatrix}}{\mathop{C{{H}_{3}}OC{{H}_{2}}C{{H}_{3}}}}\,\]


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