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प्रश्न
Explain what is observed when a beam of light is passed through a colloidal sol.
Explain the observation likely to be made when a beam of light is allowed to pass through a colloidal solution.
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उत्तर
When a beam of light is passed through a colloidal solution, then scattering of light is observed. This is known as the Tyndall effect. This scattering of light illuminates the path of the beam in the colloidal solution.
संबंधित प्रश्न
What is the reason for the stability of colloidal sols?
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Answer the following question.
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(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.
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(i) Reverse osmosis takes place.
(ii) Electroosmosis takes place.
(iii) Dispersion medium begins to move.
(iv) Dispersion medium becomes stationary.
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Reason: Colloidal particles are large in size.
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Reason: Brownian motion is responsible for stability of sols.
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Coagulation
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