Question

The functional isomer of ethanenitrile is:

• A. ethyl carbylamine
• B. methanenitrile
• C. methyl isocyanide
• D. propanenitrile

Answer 1

Answer: (C)

methyl isocyanide

Ethane nitrile is $C{H}_{3}C\equiv N$.
A) Ethyl carbylamine is $C_2{H}_5-\stackrel{f}{N}\equiv C$
B) Methanenitrile is $HCN$
C) Methyl carbylamine is $C{H}_3-\stackrel{f}{N}\equiv C$
D) Propanenitrile is $C{H}_{3}C{H}_{2}C\equiv N$
Ethanenitrile $\left(C{H}_{3}CN\right)$ and methyl carbylamine $\left(C{H}_{3}NC\right)$ have same molecular formula but different functions groups so, they are functional isomer.