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प्रश्न
What happens when gelatin is mixed with gold sol?
उत्तर
When gelatin is mixed with gold sol, gelatin forms a protective layer on gold sol, thus preventing coagulation. So gold sol becomes stabilized by adding gelatin, which is a lyophilic sol.
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संबंधित प्रश्न
Write a method by which lyophobic colloids can be coagulated.
Out of sulphur sol and proteins, which one form multimolecular colloids?
Give reasons for the following observations: Lyophilic sol is more stable than lyophobic sol.
Define the following term : Multimolecular colloids
What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?
How are colloids classified on the basis of Nature of dispersion medium
How are colloids classified on the basis of Interaction between dispersed phase and dispersion medium?
Which of the following colloids cannot be coagulated easily?
(i) Lyophobic colloids.
(ii) Irreversible colloids.
(iii) Reversible colloids.
(iv) Lyophilic colloids.
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 |
Movement of dispersion medium under the influence of electric field is known as ______.
