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प्रश्न
Method by which lyophobic sol can be protected?
पर्याय
By addition of oppositely charged sol.
By addition of an electrolyte.
By addition of lyophilic sol.
By boiling.
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उत्तर
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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संबंधित प्रश्न
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(i) Lyophobic colloids.
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Match the items given in Column I and Column II.
| Column I | Column II |
| (i) Protective colloid | (a) \[\ce{FeCl3 + NaOH}\] |
| (ii) Liquid-liquid colloid | (b) Lyophilic colloids |
| (iii) Positively charged colloid | (c) Emulsion |
| (iv) Negatively charged colloid | (d) \[\ce{FeCl3}\] + hot water |
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