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JCECE Engineering JCECE Engineering Solved Paper-2013

  • question_answer
    Which is the most suitable reagent for the following conversion? \[C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\to \]\[C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-OH\]

    A) \[Zn-Hg+HCl\]

    B) \[{{I}_{2}}+NaOH\]

    C)   Fehling?s reagent

    D)   \[Sn+NaOH\]solution

    Correct Answer: B

    Solution :

    \[C{{H}_{3}}-CH=CH-C{{H}_{2}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]\[\xrightarrow[iodoform\,\,reaction]{{{I}_{2}}+NaOH}C{{H}_{3}}-CH=CH-C{{H}_{2}}-C{{H}_{2}}COOH\]\[+CH{{I}_{3}}\]


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