How does Lyophilic colloids have less surface tension than the solvent ? ? talk ) 06 : 03, 12 August 2010 ( UTC)
2.
Coagulation of gold sol is indicated by colour change from red to blue / purple when particle size just increases . "'More is the gold number, less is the protective power "'of the lyophilic colloid since it means that the amount required is more.
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