Consider the following molecules:

List them in order of decreasing boiling point and justify your answer.

• A. III > I > IIMolecule III has higher boiling than molecule I because molecule I forms stronger hydrogen bonds. Molecule II has the lowest boiling because it exhibits the weaker dipole-dipole forces.
• B. I > III > IIMolecule I has a higher boiling than molecule III because molecule I can form more hydrogen bonds. Molecule II has the lowest boiling because it exhibits weaker dipole-dipole forces.
• C. II > I > IIIMolecule II has the highest boiling because it exhibits dipole-dipole forces, the strongest intermolecular force. Molecule III has higher boiling than molecule I because molecule I forms stronger hydrogen bonds.
• D. II > III > IMolecule II has the highest boiling because it exhibits dipole-dipole forces, the strongest intermolecular force. Molecule I has a higher boiling than molecule III because molecule I can form more hydrogen bonds.

Answer: (A)