question_answer

\[{{C}_{3}}{{H}_{9}}N\]cannot represent the following :

A)  primary amine

B) secondary amine

C) tertiary amine

D) quaternary ammonium salt

Correct Answer: D

Solution :

\[{{\text{C}}_{\text{3}}}{{\text{H}}_{\text{9}}}\text{N}\]can represent all the three types of amines (p, s, Qbut not quartemary  ammonium salts, p, s, and t  amines represent the functional isomers of amines. The various isomers are \[\left. \begin{align}   & (I)\,\,{{H}_{3}}C-C{{H}_{2}}-C{{H}_{2}}N{{H}_{2}} \\  & (II)\,H\,{{\,}_{3}}\underset{N{{H}_{2}}}{\mathop{C}}\,-CH-C{{H}_{3}} \\ \end{align} \right]\begin{matrix}    {{1}^{o}}\text{amine}  \\    [position\,isomers]  \\ \end{matrix}\] (II) \[{{H}_{3}}C-NH-C{{H}_{2}}C{{H}_{3}}\,\,\,{{2}^{o}}\,\text{amine}\] (iv)