Joint Entrance Examination/AIEEE 2009/Q073 physiosorption

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Original Question by

Here's the question...

Which of the following statements is incorrect regarding physiosorption?

 *(1) Enthalpy of adsorption (Hadsorption) is low and positive.    
 *(2) It occurs because of Van der Waal’s forces.   
 *(3) More easily liquefiable gases are adsorbed readily.   
 *(4) Under high pressure it results into multi molecular layer on adsorbent surface.

Posted by 05:31, 27 September 2009 (UTC)

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Additional notes

H for adsorption is negative. Adsorption is a spontaneous process, so G is negative and S in case of adsorption is also negative.  G = H – TS. Therefore, H is –ve.

These comments, along with the notes on the left, were contributed by 05:32, 27 September 2009 (UTC)