<prompt> In chromatography, mass movements of the substances are due toDiffusionElectrophoresisPaper chromatographyOsmosis  <response>: In chromatography, mass transfer refers to the movement of a solute through the mobile or stationary phases, i.e. net mass transfer of the solute from one phase to the other.Transfer of solute through a specific phase is by diffusion and is concentration driven according to Ficks law. 