AFMC AFMC Solved Paper-2002

  • question_answer
    Aniline chloroform and alcoholic KOH reacts to produce a bad smelling substance which is:

    A) phenyl isocyanide

    B) phenyl cyanide

    C) chloro benzene

    D) benzyl alcohol

    Correct Answer: A

    Solution :

    The given reaction is called carbylamines reaction \[\underset{p-a\min e\,oraniline}{\mathop{RN{{H}_{2}}+CHC{{l}_{3}}}}\,+\underset{alc}{\mathop{3K.OH}}\,\xrightarrow{{}}\underset{Alkyl\,isocyanide}{\mathop{RNC}}\,\] \[+\,3\,KCl+3{{H}_{2}}O\]                 \[{{C}_{6}}{{H}_{5}}N{{H}_{2}}+CHC{{l}_{3}}+3KOH\xrightarrow{{}}\] \[\underset{Phenyl\,isocyanide}{\mathop{{{C}_{6}}{{H}_{5}}NC+3KCl}}\,+3{{H}_{2}}O\] All isocyanides are foul smelling compound. This is a test to identify primary amines.


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