It is due to force of attraction between dispersed phase and dispersion medium.They are self stabilised because of strong attractive forces operating between the suspended particels and dispersion medium. for example gums, gelatin etc.
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What causes Brownian movement in a colloidal solution?
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Give reason why a finely divided substance is much more effective as an adsorbent.
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Long Answer Type
Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.
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What is the difference between physisorption and chemisorption?
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Short Answer Type
Explain the following observations: (a) Cottrell’s smoke precipitator is fitted at the mouth of the chimney used in factories. (b) Physical adosption is multi layered, while chemisorption non-tayered.
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What are the factors which influence the adsorption of a gas on a solid?
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Describe electrophoresis briefly.
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Sky appears blue in colour. Why?
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Which has a higher enthalpy of adsorption, physisorption or chemisorption?
