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NEET Sample Paper NEET Sample Test Paper-58

  • question_answer
    In a set of reactions, propionic acid yielded a compound D\[C{{H}_{3}}C{{H}_{2}}COOH\xrightarrow{SOC{{l}_{2}}}\,B\,\xrightarrow{N{{H}_{3}}}\,C\,\xrightarrow{B{{r}_{2}}/KOH}\,d\] [A] The structure of D would be:

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

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

    C) \[C{{H}_{3}}C{{H}_{2}}CON{{H}_{2}}\]      

    D) \[C{{H}_{3}}C{{H}_{2}}NHC{{H}_{3}}\]

    Correct Answer: A

    Solution :

    [a] \[C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}\] \[C{{H}_{3}}\,\underset{(A)}{\mathop{C{{H}_{2}}}}\,\,COOH\xrightarrow{SOC{{l}_{2}}}\,C{{H}_{3}}\,\underset{(B)}{\mathop{C{{H}_{2}}}}\,\,COCl\] \[\xrightarrow[-N{{H}_{4}}Cl]{N{{H}_{3}}(excess)}C{{H}_{3}}\,\underset{(c)}{\mathop{C{{H}_{2}}}}\,\,CN{{H}_{2}}\] \[\xrightarrow[{}]{B{{r}_{2}}/KOH}C{{H}_{3}}\,\underset{(D)}{\mathop{C{{H}_{2}}}}\,\,N{{H}_{2}}\]


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