Dipole-induced dipole interactions are present between a polar and a non-polar molecule. In NH3 and H2,NH3 is polar and H2 is non-polar, so they have dipole-induced dipole interactions. In H2O and C2H5OH, both are polar, so they do not have dipole-induced dipole interactions. In Cl2 and CCl4, and SiF4 and BF3 both are non-polar, so they do not have dipole-induced dipole interactions.