Whate happens in the following activities and why? (i) An electrolyte is added to a hydrated ferric oxide sol in water. (ii) A bean of light is passed through a colloidal solution. (iii) An electric current is passed through a colloidal soluidal solution.

Whate happens in the following activities and why? (i) An electrolyte

1.	Whate happens in the following activities and why? (i) An electrolyte is added to a hydrated ferric oxide sol in water. (ii) A bean of light is passed through a colloidal solution. (iii) An electric current is passed through a colloidal soluidal solution.
Answer» (i) When an elecrolyte like KCl is added of `Fe(OH)_(3)` sol , the positively charged colloidal particles of `Fe(OH)_(3)` get coagulated by the oppositely charged `Cl^(-)` ions provided by KCl. (ii) When a bean of strong light is passed through a colloidal solution scattering of light by colloidal particles takes place and the path of light becomes visible . this phenomenon is called Tydall effect. (iii) On passing the electric current , colloidal particles move towards the oppositely charged electrode where they lose their charge and get coagulated.

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Whate happens in the following activities and why? (i) An electrolyte is added to a hydrated ferric oxide sol in water. (ii) A bean of light is passed through a colloidal solution. (iii) An electric current is passed through a colloidal soluidal solution.

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