Question

Which of the following compounds has lowest boiling point?

Options

• n-butyl alcohol

• Iso-butyl alcohol 

• Tert-butyl alcohol

• Sec-butyl alcohol

Answer 1

Tert-butyl alcohol

Explanation:

For isomeric alcohols, the boiling point decreases with increased carbon chain branching. Therefore, tert butyl alcohol has lowest boiling point.

\[\begin{array}{cc}
\ce{CH3}\\
|\\
\ce{H3C - C - CH3}\\
|\\
\ce{\underset{Tert-butyl alcohol}{OH}}
\end{array}\]