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Explain what is observed when (i) Silv...

Explain what is observed when
(i) Silver Nitrate solution is added to potassium iodide solution.
(ii) The size of the finest gold sol particles increases in the gold sol.
(iii) Two oppositely charged sols are mixed in almost equal proportions.

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(i) Yellow precipitate of silver iodide is formed
`AgNO _(3)(aq)+KI(aq)tounderset(("Yellow ppt"))(AgI(s)+KNO_(3)Ca_(2)`
(ii) Colloidal sol of gold is formed and is known as multi molecular colloid.
(iii) Both get coagulated.
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