Question

which of the following is an example of an intermolecular force?
pi bond
dipole - dipole force
sigma bond
covalent bond

Explanation:

Intermolecular forces are attractions between molecules, while intramolecular forces (like bonds) hold atoms within a molecule. Pi bonds, sigma bonds, and covalent bonds are all intramolecular. Dipole-dipole forces occur between polar molecules, so they are intermolecular.

Answer:

dipole-dipole force