Manipal Medical Manipal Medical Solved Paper-2000

  • question_answer
    \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\xrightarrow[{}]{NaN{{O}_{2}}HCl}X\xrightarrow[{}]{C{{u}_{2}}{{(CN)}_{2}}}\] \[Y\xrightarrow[{}]{{{H}_{2}}O/{{H}^{+}}}Z\] Z is identified as:

    A)  \[{{C}_{6}}{{H}_{5}}-NH-C{{H}_{3}}\]

    B)  \[{{C}_{6}}{{H}_{5}}-COOH\]

    C)  \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-N{{H}_{2}}\]

    D)  \[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}-COOH\]

    Correct Answer: B

    Solution :

     \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}\xrightarrow[{}]{NaN{{O}_{2}}/HCl}\underset{(X)}{\mathop{{{C}_{6}}{{H}_{5}}{{N}_{2}}Cl}}\,\] \[\xrightarrow[{}]{C{{u}_{2}}{{(CN)}_{2}}}\underset{(Y)}{\mathop{{{C}_{6}}{{H}_{5}}CN}}\,\xrightarrow[{}]{{{H}_{2}}O/{{H}^{+}}}\] \[\underset{benzoic\text{ }acid\text{ }(Z)}{\mathop{{{C}_{6}}{{H}_{5}}-COOH}}\,\] Thus, product Z is identified as\[{{C}_{6}}{{H}_{5}}-COOH\]


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