Chemistry - Hydrocarbon Question with Solution | TestHub

The highest boiling point is expected for n-octane and least for n-butane.
Boiling point of alkane increases with the increase in carbon atoms. In isomeric alkanes, the molecule becomes more and more compact with the increase in branching and therefore, surface area of the molecule decreases and consequently van dar Waal's forces, which depends upon surface area, decrease and hence, boiling point decreases with the increase in branching.