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(a) A colloidal sol is prepared by the g...

(a) A colloidal sol is prepared by the given method in figure. What is the charge of AgI colloidal particles in the test tube ? How is the sol formed, represented?
(b) Explain how the phenomenon of adsorption finds application in Heterogeneous catalysis.
(c) Which of the following electroytes is the most effective for the coagulation of `Fe(OH)_(3)` sol which is a positively charged sol?
`NaCI, Na_(2)SO_(4), Na_(3)PO_(4)`

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