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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.
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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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