Which isomer of $\mathrm{C}_4 \mathrm{H}_9 \mathrm{OH}$ has lower boiling point?
Which isomer of $\mathrm{C}_4 \mathrm{H}_9 \mathrm{OH}$ has lower boiling point?
n-Butyl alcohol
Isobutyl alcohol
Sec-Butyl alcohol
tert-Butyl alcohol
Solution
Boiling point decreases with an increase in branching. Amongst all the isomers of $\mathrm{C}_4 \mathrm{H}_9 \mathrm{OH}$, tert-Butyl alcohol has the maximum branching and hence, it has the lowest boiling point.