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प्रश्न
Give reasons for the following observations:
Brownian movement provides stability to the colloidal solution.
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उत्तर
Brownian motion counters the force of gravity acting on the colloidal particles and hence helps in providing stability to the colloidal sols by not allowing them to settle.
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संबंधित प्रश्न
Explain the term Electrophoresis
What happens when an emulsion is centrifuged?
Which of the following will show Tyndall effect?
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: Colloidal solutions do not show brownian motion.
Reason: Brownian motion is responsible for stability of 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).
Gold number is associated with:-
The important factor in the stabilization of a colloidal solution is ______
6.84 g Al2(SO4)3 is needed to coagulate 2.5 L of As2S3 sol completely in 2.0 hrs. The coagulation value of Al2 (SO4)3 is ______.
Lyophilic sols are more stable than lyophobic sols because ______.
