CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2003

  • question_answer
    A gaseous carbon compound is soluble in dilute \[HCl\]. The solution on treating with \[NaN{{O}_{2}}\] gives off nitrogen leaving behind a solution which smells of wood spirit. The carbon compound is:

    A)  \[HCHO\]                           

    B)  CO

    C)  \[{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]                              

    D)  \[C{{H}_{3}}N{{H}_{2}}\]

    Correct Answer: D

    Solution :

    It is methyl amine which, being basic, dissolves in dilute\[HCl\]. It with \[NaN{{O}_{2}}\] evolves nitrogen gas leaving behind methyl alcohol which has smell of wood-spirit. \[C{{H}_{2}}N{{H}_{2}}\xrightarrow{HCl}C{{H}_{2}}NH\,.\,HCl\] \[C{{H}_{3}}N{{H}_{2}}+HN{{O}_{2}}\xrightarrow{NaN{{O}_{2}}/HCl}\underset{methyl\text{ }alcohol}{\mathop{C{{H}_{3}}OH}}\,\]                                                                 \[+{{N}_{2}}\uparrow +{{H}_{2}}O\]


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