By Sunil Bhardwaj


#Lyophilic Sol (solvent loving):Lyophobic sol (solvent hating):
1Lyophilic colloids pass into the colloidal form readily when brought in contact with solvent.Lyophobic colloids do not form, the colloidal solutions easily when treated with solvent.
2They are called, the reversible sols because they can be recovered from the colloidal solutions and can be converted into the colloidal form when desired.They are called irreversible sols because they can not be recovered from their colloidal form.
3Small quantities of electrolytes do not effect precipitation, but only large quantities of electrolytes cause precipitation.Even small quantities of the electrolytes can cause precipitation.
4The particles are not easily detected in the ultra-microscope.The particles are easily detected by an ultra-microscope.
5The particles may or may not migrate an electric field. The migration may be in any direction.Particles migrate only in one direction.
6Substances like starch, proteins, gums, soaps, and metasilicic acid are common.Colloids of metals (Au, Pt), sulphur, arsenius sulphide and silver iodide are common examples.