The correct statement (s) about surface properties is (are)

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Adsorption is accompanied by decrease in enthalpy and decrease in entropy of the system

Cloud is an emulsion type of colloid in which liquid is dispersed phase and gas is dispersion medium

The critical temperatures of ethane and nitrogen are 563K and 126K ,respectively. The adsorption of ethane will be more than that of nitrogen on same amount of activated charcoal at a given temperature

Brownian motion of colloidal particles does not depend on the size of the particles but depends on viscosity of the solution

answer is A.

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Detailed Solution

Adsorption degree of freedomDecreases so DS = NegativeΔG=−ve( Spon tan eous )ΔS=−veΔH=−veΔG=ΔH−TΔS =−ve−T(−ve)At low temp. favoursCloud is not emulsionxmαTc as Tc (critical temp ↑ High liquification ↑ all reactions ↑xm also ↑ )

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