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JEE Main & Advanced JEE Main Paper (Held On 10 April 2015)

  • question_answer
    In the presence of a small amount of phosphorous, aliphatic carboxylic acids react with chlorine or bromine to yield a compound in which \[\text{ }\!\!\alpha\!\!\text{ -}\]hydrogen has been replaced by halogen. This reaction is known as : JEE Main Online Paper (Held On 10 April 2015)

    A)  Rosemond reaction

    B)  Etard reaction

    C)  Wolff - Kischner reaction

    D)  Hell - Volhard - Zelinsky reaction

    Correct Answer: D

    Solution :

                     Hell - volhard- Zelinsky Reaction \[C{{H}_{3}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-OH\xrightarrow[{}]{C{{l}_{2}}/\operatorname{Re}d'P'}\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C{{H}_{2}}}}\,-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-OH\]


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