Question

Which of the following compounds would have the highest boiling point ?

• A. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_3$
• B. $C{H}_{3}N{H}_2$
• C. $C{H}_{3}OH$
• D. $C{H}_2{F}_2$

Answer 1

Answer: (C)

Compounds in which $H$ is directly linked with $N$ or $O$ or $F$, have a capability of forming $H$ -bonds which result in increased boiling point.

Among the given, only $C{H}_{3}OH$ and $C{H}_{3}N{H}_2$ are able to form $H$-bonds but $H$-bonding in $C{H}_{3}OH$ due to high electronegativity of $O$-atom, is strong. Hence, $C{H}_{3}OH$ has the highest boiling point.