The major type of interactive forces between molecules of HCl are: ionic covalent hydrogen bonding dipole-dipole attractions dispersion forces Solution Dipole - Dipole attraction is the major type of interactive forces between HCl molecules. these interaction are basically the electrostatic interaction between the permanent dipoles in the mlecules. this interaction occurs when the partially negatively charged part of one molecule (in case of HCl it is Cl- ) interacts with partially positive charge of the other molecule (H+ in case of HCl)..