Chapter 3, Problem 47P

Interpretation Introduction

Interpretation: The explanation corresponding to the given statement that benzene has a lower boiling point but much higher melting point than toluene is to be stated.

Concept introduction: Melting point and boiling point depends upon the intermolecular forces. Greater is the intermolecular forces, greater will be the boiling and melting point.

Intermolecular forces are also known as non-covalent interactions. The interactions present between molecules are known as intermolecular forces. A functional group present in a molecule decides the type of interaction.

Therefore, the increasing order of melting and boiling point is as follows:

$\text{Van}\text{der}\text{Waals}<\text{Dipole}-\text{Dipole}<\text{Hydrogen}\text{bonding}$