CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2007

  • question_answer
    Which one of the following compounds will dissolve in an alkali solution after it has undergone reaction with Hinsberg reagent?

    A)  \[C{{H}_{3}}N{{H}_{2}}\]             

    B)         \[{{(C{{H}_{3}})}_{3}}N\]

    C)  \[{{({{C}_{2}}{{H}_{5}})}_{2}}NH\]          

    D)         \[{{C}_{6}}{{H}_{5}}NH{{C}_{6}}{{H}_{5}}\]

    E)  \[{{({{C}_{6}}{{H}_{5}})}_{3}}N{{H}^{+}}C{{l}^{-}}\]

    Correct Answer: A

    Solution :

    \[\underset{1{}^\circ a\min e}{\mathop{C{{H}_{3}}N{{H}_{2}}}}\,+\underset{\begin{smallmatrix}  Hinsbergs \\  \,\,\,\,reagent \end{smallmatrix}}{\mathop{{{C}_{6}}{{H}_{5}}S{{O}_{2}}Cl}}\,\to \underset{\begin{align}   & N-methyl\text{ }benzene \\  & \,\,\,sulphonamide \\  & \downarrow NaOH(alkali) \\  & {{C}_{6}}{{H}_{5}}S{{O}_{2}}N(Na)C{{H}_{3}} \\  & soluble\text{ }sodium\text{ }salt \\ \end{align}}{\mathop{{{C}_{6}}{{H}_{5}}S{{O}_{2}}NHC{{H}_{3}}}}\,\]


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