Punjab Medical Punjab - MET Solved Paper-2009

  • question_answer
    Identify \[Z\] in the following sequence of reactions. \[C{{H}_{3}}COOH\xrightarrow{N{{H}_{3}}}X\xrightarrow{\Delta }Y\xrightarrow{{{P}_{2}}{{O}_{5}}}Z\]

    A) \[C{{H}_{4}}\]                                   

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

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

    D) \[C{{H}_{3}}CO{{O}^{-}}NH_{4}^{+}\]

    Correct Answer: C

    Solution :

    \[C{{H}_{3}}COOH\xrightarrow{N{{H}_{3}}}C{{H}_{3}}COON{{H}_{4}}\xrightarrow[-{{H}_{2}}O]{\Delta }\]\[C{{H}_{3}}C\underset{Y}{\mathop{O}}\,N{{H}_{2}}\xrightarrow[-{{H}_{2}}O]{{{P}_{2}}{{O}_{5}}}\underset{\begin{smallmatrix}  Z \\  (methyl\,\,cyanide) \end{smallmatrix}}{\mathop{C{{H}_{3}}CN}}\,\]


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