Question

which intermolecular forces are present between two HCl molecules

Answer 1

All molecules and atoms have London dispersion (i.e. van der Waals) forces. With HCl , a polar molecule, all we say is that the predominant intermolecular force is dipole dipole interaction. Even though HCl has dispersion forces, they are overshadowed by dipole-dipole by far.

Answer 2

HCl atom is made of polar covalent bond.

Hence, HCl molecule have dipole-dipole interactions between them which is a type of Van der waals forces.