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Explain what is observed when ltbr. `a.` An electrolyte `NaCl` is added to hydrated ferric oxide sol. `b.` Electric current is passed through a colloi

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Explain what is observed when ltbr. a. An electrolyte NaCl is added to hydrated ferric oxide sol. b. Electric current is passed through a colloidal sol. c. When a beam of light is passed through a collidal solution. Select the correct answer from above options

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a. The positively charged colloidal particles of Fe(OH)3 get coagulated by the oppositely charged Clc- ions provided by NaCl . ltbr.b. On passing direct current , colloidal particles move towards the oppositely charged electrodes where they lose their charge and get coagulated. ltbr. c . Scattering of light by the colloidal particels takes place and the path of light becomes visible ( Tyndall effect ) .

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