The method by which lyophobic sol can be protected. (i) By the addition of oppositely charged sol. (ii) By the addition of an electrolyte. (iii) By the addition of lyophilic sol. (iv) By boiling.
Lyophobic sol can be protected by addition of lyophilic sol. As lyophobic sols are readily precipitated on addition of small amount of electrolytes or shaking, or heating hence they are made stable by adding lyophillic sol which stabilises the lyophobic sols.
