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प्रश्न
How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?
उत्तर
One criterion for classifying colloids is the physical state of the dispersed phase and dispersion medium. Depending upon the type of the dispersed phase and dispersion medium (solid, liquid, or gas), there can be eight types of colloidal systems.
| Dispersed phase | Dispersion medium | Type of colloid | Example |
| Solid | Solid | Solid Sol | Gemstone |
| Solid | Liquid | Sol | Paint |
| Solid | Gas | Aerosol | Smoke |
| Liquid | Solid | Gel | Cheese |
| Liquid | Liquid | Emulsion | Milk |
| Liquid | Gas | Aerosol | Fog |
| Gas | Solid | Solid foam | Pumice stone |
| Gas | Liquid | Foam | Froth |
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संबंधित प्रश्न
What are lyophilic and lyophobic colloids ? Which of these sols can be easily coagulated on the addition of small amounts of electrolytes?
Write a method by which lyophobic colloids can be coagulated.
Give reasons for the following observations: Lyophilic sol is more stable than lyophobic sol.
Define the following term : Multimolecular colloids
How are colloids classified on the basis of Physical states of components
How are colloids classified on the basis of Nature of 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 |
Movement of dispersion medium under the influence of electric field is known as ______.
Differentiate between the following:
Lyophobic Sol and Lyophilic Sol
