List the types of intermolecular forces that exist between molecules (or basic units) in each of the following species: (a) benzene (C6H6), (b) CH3Cl,

(c) PF3, (d) NaCl, (e) CS2.

Benzene (C6H6) = nonpolar molecules. Dispersion forces are present only. Chloroform (CH3Cl) = polar molecules. Dispersion and dipole-dipole forces are present. Phosphorus trifluoride (PF3) molecules are polar. Dispersion and dipole-dipole forces are present. Sodium chloride (NaCl) = ionic compound. Ion-ion and dispersion forces are present. Carbon disulfide (CS2) = nonpolar molecules. Dispersion forces are present only.