Its given in my text book that-
Colloidal dispersions of starch,rubber,proteins etc are lyophilic colloids whereas colloidal dispersions of metals,sulphides etc are lyophobic in nature.
But even the protein molecules have both hydrophilic as well as hydrophobic ends. And metals being ionised have strong affinity for polar dispersion medium. They why is it given that metals sols are lyphobic whereas sols generated from macromolecules are lyophilic colloids.
Is it because we can create protein or other macromolecular sols just by simply shaking in dispersions medium and generation of metal sols require certain chemical and mechanical means.
What is the real definition for lyophilic colloids and lyophobic colloids?