What are dipole-dipole force, london forces and hydrogen forces?
dipole-dipole , london forces, and hydrogen forces are collectivelly called vanderwaal forces
dipole dipole forces is the force of attraction between two polar molecules like HCl in which one atom here H has slight + charge and other slight -ve charge hereCl.
london forces occur between two non polar molecules due to distortion of electron cloud for short period.
hydrogen forces are hydrogen bonds or weak bonds between organic componds.
and above three forces are collectively calles vanderwaal forces