Identify the statements which is incorrect w.r.t. surface phenomenon. (1) A sol, prepared by add...

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Identify the statements which is incorrect w.r.t. surface phenomenon.
(1) A sol, prepared by adding excess \( \mathrm{AgNO}_{3} \) solution in \( \mathrm{KI} \) solution when subjected to electro-phoresis will show coagulation near cathode.
(2) The conductivity of a soap solution decreases steeply at \( \mathrm{CMC} \).
(3) Tyndall effect will be more prominent in gold solution as compared to rubber solution.
(4) Extent of physisorption increases with increase in temperature initial and then decreases with temperature.
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