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Question
Method by which lyophobic sol can be protected?
Options
By addition of oppositely charged sol.
By addition of an electrolyte.
By addition of lyophilic sol.
By boiling.
Solution
By addition of lyophilic sol.
Explanation:
Lyophilic colloids have unique property of protecting lyophobic colloids. When a lyophilic sol is added to lyophobic solution, the lyophilic particles from a layer around the lyophobic particles and project the latter from electrolytes. Lyophilic vcolloids used for this purpose are called protective colloids.
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