Gold sol
Gold Sol is Colloidal Gold. Gold Sol can be produced by boiling a solution of tetracholoroauric acid with a reducing agent. At the beginning of the reduction process the gold atoms are liberated from the chloroauric acid.
Meaning
Gold sol is a special type of collide which is known as lyophobic sol which are liquid hating or solvent hating i.e., these sols do not have liquid as solvent. In such sols, both the dispersed phase and dispersion medium is solid only. A gold sol may contain particles of various size composed of several atoms of gold and so it is called as multimolecular sol.