Answer
a. dispersion, dipole-dipole forces.
b. dispersion, dipole-dipole forces
c. dispersion, dipole-dipole forces, and hydrogen bonds.
d. dispersion forces
Work Step by Step
a. $O_{3}$ is a polar molecule and it has it has dispersion, dipole-dipole forces.
b. $HBr$ is a polar molecule and it has it has dispersion, dipole-dipole forces.
c. $CH_{3}OH$ is a polar molecule and H is bonded to O, so it has dispersion, dipole-dipole forces, and hydrogen bonds.
d. $I_{2}$ is an element and it has dispersion forces
