DUMET Medical DUMET Medical Solved Paper-2007

  • question_answer
    In the reaction \[C{{H}_{3}}C{{H}_{2}}COON{{H}_{4}}\xrightarrow{{{P}_{2}}{{O}_{5}}}A\xrightarrow{{{H}^{+}}/{{H}_{2}}O}B\] A and B are

    A)  \[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}},C{{H}_{3}}C{{H}_{2}}CO{{O}^{-}}\]

    B)  \[C{{H}_{3}}C{{H}_{2}}COON{{H}_{2}},C{{H}_{3}}C{{H}_{2}}COOH\]

    C)  \[C{{H}_{3}}C{{H}_{2}}CN,C{{H}_{3}},C{{H}_{2}}CO{{O}^{-}}\]

    D)  \[C{{H}_{3}}C{{H}_{2}}CN,C{{H}_{3}},C{{H}_{2}}COOH\]

    Correct Answer: D

    Solution :

    \[C{{H}_{3}}C{{H}_{2}}COON{{H}_{4}}\xrightarrow[-2{{H}_{2}}O]{{{P}_{2}}{{O}_{5}}}C{{H}_{3}}C{{H}_{2}}CN\]\[\xrightarrow{{{H}^{+}}/{{H}_{2}}O}\underset{propanoic\text{ }acid}{\mathop{C{{H}_{3}}C{{H}_{2}}COOH}}\,\] Note: \[{{P}_{2}}{{O}_{5}}\] acts as a dehydrating agent.


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