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प्रश्न
What is the reason for the stability of colloidal sols?
Write the main reason for the stability of colloidal sols.
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उत्तर १
Reasons for the stability of colloidal sols:
a. Coagulation of the colloidal sol is prevented because of the presence of equal and similar charges on the colloidal particles.
b. Colloidal particles are covered by a sheath of liquid in which they are extensively solvated because of which they acquire stability.
उत्तर २
There are two main reasons for the stability of colloidal sols:
1. Electrostatic stabilisation: Presence of equal and similar charges on the colloidal particles prevents coagulation of the colloidal sol.
2. Solvation: Colloidal particles are covered by a sheath of liquid in which they are extensively solvated, thereby providing stability.
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संबंधित प्रश्न
Define the following terms: Associated colloids
Explain what is observed when an electrolyte NaCl is added to hydrated ferric oxide sol.
Explain the term Electrophoresis
Explain the terms Dialysis
What happens when persistent dialysis of a colloidal solution is carried out?
Which of the following statements are correct?
(i) Mixing two oppositely charged sols neutralises their charges and stabilises the colloid.
(ii) Presence of equal and similar charges on colloidal particles provides stability to the colloids.
(iii) Any amount of dispersed liquid can be added to emulsion without destabilising it.
(iv) Brownian movement stabilises sols.
Assertion: Coagulation power of Al3+ is more than Na+.
Reason: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy Schulze rule).
What is Gold number?
Which of the following is used for removing change on colloidal solution?
Gold number is associated with:-
