Only London dispersion forces act between the molecules of

$\mathrm{Br}{}_2$ is a non-polar homonuclear molecule, so only instantaneous dipole-induced dipole (London) forces exist. $\mathrm{HCl}$ is polar (dipole-dipole), while $\mathrm{NH}{}_3$ and $\mathrm{H}{}_2\mathrm{O}$ also form hydrogen bonds.