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VMMC VMMC Medical Solved Paper-2012

  • question_answer
    For the conversion of \[C{{H}_{2}}=C{{H}_{2}}\]into \[HOOC.C{{H}_{2}}C{{H}_{2}}COOH,\] the   minimum number of steps required are          

    A)  2              

    B)  3

    C)  4              

    D)  5           

    Correct Answer: A

    Solution :

      \[HCOCl\xrightarrow{{}}HCl+CO\] \[\underset{C{{H}_{2}}}{\overset{C{{H}_{2}}}{\mathop{||}}}\,+\underset{cyanogen}{\mathop{{{(CN)}_{2}}}}\,\xrightarrow{Step-I}\underset{C{{H}_{2}}CN}{\overset{C{{H}_{2}}CN}{\mathop{|}}}\,\] \[\underset{C{{H}_{2}}CN}{\overset{C{{H}_{2}}CN}{\mathop{|}}}\,+{{H}_{3}}{{O}^{+}}\xrightarrow{Step-II}\underset{C{{H}_{2}}.COOH}{\overset{C{{H}_{2}}.COOH}{\mathop{|}}}\,\]


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