MCQ
Method by which lyophobic sol can be protected.
- ABy addition of oppositely charged sol.
- BBy addition of an electrolyte.
- ✓By addition of lyophilic sol.
- DBy boiling.
✓
Answer
Correct option: C.
By addition of lyophilic sol.
Lyophilic colloids have a unique property of protecting lyophobic colloids. When a lyophilic sol is added to the lyophobic sol, the lyophilic particles form a layer around lyophobic particles and thus protect the latter from electrolytes. Lyophilic colloids used for this purpose are called protective colloids.
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