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प्रश्न
Define the following terms: Lyophilic colloid
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उत्तर
Colloidal sols directly formed by mixing substances such as gum, gelatine, starch and rubber with a suitable liquid (the dispersion medium) are called lyophilic sols.
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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
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 the nature of 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 |
Differentiate between the following:
Lyophobic Sol and Lyophilic Sol
