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प्रश्न
Write a method by which lyophobic colloids can be coagulated.
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उत्तर
Lyophobic colloids can be coagulated by the electrophoresis method. The colloidal particles move towards the oppositely charged electrodes, get discharged and precipitated.
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संबंधित प्रश्न
Define the following terms: Lyophilic colloid
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.
Why are hydrophobic sols easily coagulated?
How are colloids classified on the basis of Physical states of components
How are colloids classified on the basis of interaction between the dispersed phase and the dispersion medium?
Method by which lyophobic sol can be protected?
Which of the following colloids cannot be coagulated easily?
(i) Lyophobic colloids.
(ii) Irreversible colloids.
(iii) Reversible colloids.
(iv) Lyophilic colloids.
What happens when gelatin is mixed with gold sol?
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 |
