J & K CET Engineering J and K - CET Engineering Solved Paper-2010

  • question_answer
    Which of the following reagent can be used to convert ethanamide to methanamme?

    A) \[{{P}_{2}}{{O}_{5}}\]

    B)  \[NaOBr\]

    C)  \[LiAl{{H}_{4}}/{{H}_{2}}O\]

    D)  \[Na(Hg)/{{C}_{2}}{{H}_{5}}OH\]

    Correct Answer: B

    Solution :

     \[\text{NaOBr}\]converts\[-\text{CON}{{\text{H}}_{\text{2}}}\] group into \[-\text{N}{{\text{H}}_{\text{2}}}\]group. \[\underset{\text{ethanamide}}{\mathop{C{{H}_{3}}CON{{H}_{2}}}}\,\xrightarrow[\begin{smallmatrix}  -N{{a}_{2}}C{{O}_{3}} \\  \,\,-NaBr  \\  \,\,-{{H}_{2}}O \end{smallmatrix}]{NaOBr}\underset{\text{methanamine}}{\mathop{C{{H}_{3}}N{{H}_{2}}}}\,\]


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