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

  • question_answer
    Glycerol heated with oxalic acid at \[{{110}^{o}}C\] to form [CPMT 1986, 90, 91, 97; JIPMER 1997]

    A)                 Formic acid

    B)                 Oxalic acid

    C)                 Allyl alcohol       

    D)                 Glycerol trioxalate

    Correct Answer: A

    Solution :

               \[\underset{C{{H}_{2}}-OH}{\overset{C{{H}_{2}}-OH}{\mathop{\underset{|\,\,\,\,}{\overset{|\,\,\,\,}{\mathop{CH}}}\,-OH\,\,\,}}}\,+\begin{matrix}    COOH  \\    \overset{|}{\mathop{C}}\,OOH  \\ \end{matrix}\underset{-{{H}_{2}}O}{\mathop{\xrightarrow{{{110}^{o}}C}}}\,\underset{\text{Glycerol}\,\,\text{mono-oxolate}}{\mathop{\underset{C{{H}_{2}}-OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{C{{H}_{2}}-O-CO-COOH}{\mathop{\underset{|\,\,\,\,}{\overset{|\,\,\,\,}{\mathop{CH}}}\,-OH\,\,\,\,\,\,\,\,\,\,\,\,\,\xrightarrow[-C{{O}_{2}}]{}}}}\,}}\,\]\[\underset{\text{Glycerol}\,\,\text{mono-formate}}{\mathop{\underset{C{{H}_{2}}-OH\,\,\,\,\,\,\,\,\,\,\,\,\,}{\overset{C{{H}_{2}}-O-CO-H}{\mathop{\underset{|\,\,\,\,}{\overset{|\,\,\,\,}{\mathop{CH}}}\,-OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}}\,}}\,\xrightarrow{\text{Hydrolysis}}\underset{\text{Formic}\,\,\text{acid}}{\mathop{\underset{HCOOH}{\mathop{\underset{+}{\mathop{\underset{C{{H}_{2}}-OH}{\overset{C{{H}_{2}}-OH}{\mathop{\underset{|\,\,\,\,}{\overset{|\,\,\,\,}{\mathop{CH}}}\,-OH\,\,\,\,}}}\,}}\,}}\,}}\,\]


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