Final answer:
Molecules with a carbonyl group exhibit polar dipole-dipole interactions due to the different electronegativities of carbon and oxygen, as well as London dispersion forces.
Step-by-step explanation:
Molecules with a carbonyl group (C=O) exhibit intermolecular forces that include dipole-dipole interactions and London dispersion forces. The carbonyl group is polar because oxygen is more electronegative than carbon, resulting in a partial negative charge on the oxygen atom and a partial positive charge on the carbon atom.
This separation of charges leads to electrostatic attractions between molecules, contributing to the dipole-dipole interactions. In addition to this, all molecules experience London dispersion forces, which are a result of temporary fluctuations in the electron distribution within molecules.
Molecules with a carbonyl group exhibit polar dipole-dipole interactions due to the different electronegativities of carbon and oxygen, as well as London dispersion forces.