Colloidal solutions of gold prepared by different methods are of diffe

1.	Colloidal solutions of gold prepared by different methods are of different colours because of
Answer» variable valency of GOLD different CONCENTRATION of gold particles impurities produce by different methods different diameters of colloidal gold particles. Solution :Colour of a colloidal solutio, in general, depends UPON the size of the colloidal particles and POSITION of the viewer.

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