Which of the following statement is incorrect?

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The elevation in boiling point of an alcoholic solution of sulphur is more than that of its sol in water, if mass of sulphur present per unit volume of mixture is same in both case.

$CMC$ value of ${CH}_{3} {({CH}_{2})}_{9} {NH}_{2} Cl$ will be less than that of ${CH}_{3} {({CH}_{2})}_{6} COONa .$

Freundlich adsorption theory is followed at all pressures.

${CO}_{2} (g)$ can displace adsorbed $O_{2} (g)$ from surface of an adsorbent showing physisorption.

answer is C.

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Detailed Solution

(1) because of solution formation number of sulfur particles will be less in water.
(2) $CMC \propto$ size of hydrophobic portion.
(3) it is applicable for limited range of pressure.
(4) ${CO}_{2}$ is non polar having more molecular mass so will be adsorbed more and replace $O_{2}$ (non polar gas with less molecular mass)

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