Chemistry - Hydrocarbon Question with Solution | TestHub

The given compounds are isomers of hexane ($C_6{H}_{14}$).

The boiling point of alkanes depends on the magnitude of intermolecular van der Waals forces, which are directly proportional to the surface area of the molecule.

As the branching in an alkane increases, the molecule becomes more spherical in shape. This decreases the effective surface area of contact between molecules, leading to weaker van der Waals forces and a lower boiling point.

Among the given isomers, n-hexane is a straight-chain alkane with no branching, so it has the maximum surface area and the strongest intermolecular forces. Therefore, n-hexane has the highest boiling point.

Answer: n-Hexane