First slide
Surface phenomenon

Which gas is adsorbed to a maximum extent on the given surface?


If a gas readily soluble in water and is easily liquefiable as NH3,HCl,CO2 is adsorbed more than the permanent gases as N2 ,O2,H2 Also critical  (Tc) temperature of NH3 is highest. 

Larger the value of Tc larger the adsorption.

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