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Question
Define the following term:
Multimolecular colloids
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Solution
Multimolecular colloids are species having size in the colloidal range (diameter < 1 nm) that are formed by the aggregation of large number of atoms or small molecules of substances when dissolved in the dispersion medium.
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RELATED QUESTIONS
What are lyophilic and lyophobic colloids ? Which of these sols can be easily coagulated on the addition of small amounts of electrolytes?
Define the following terms: Lyophilic colloid
Write a method by which lyophobic colloids can be coagulated.
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 the nature of the dispersion medium?
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?
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 ______.
