A) Famine
B) \[{{2}^{o}}\]amine
C) \[{{3}^{o}}\]amine
D) quaternary salt
Correct Answer: D
Solution :
\[{{C}_{3}}{{H}_{9}}N\] represents following structures \[\underset{\begin{smallmatrix} Propanamine \\ ({{1}^{o}}\,amine) \end{smallmatrix}}{\mathop{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}N{{H}_{2}}}}\,\,\,\,\underset{\begin{smallmatrix} N\text{ }-methyl\text{ }-ethanamine \\ ({{2}^{o}}\,amine) \end{smallmatrix}}{\mathop{C{{H}_{3}}C{{H}_{2}}-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-C{{H}_{3}}}}\,\] \[\underset{\begin{smallmatrix} N,N-dimethyl\text{ }methanamine \\ ({{3}^{o}}a\min e) \end{smallmatrix}}{\mathop{C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{N}}\,-C{{H}_{3}}}}\,\] \[\therefore \] quaternary salt cannot be represented by\[{{C}_{3}}{{H}_{9}}N\].
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