question_answer 43)

    Which of the following is not a favourable condition for physical adsorption? (a) High pressure (b) Negative AH (c) Higher critical temperature of adsorbate (d) High temperature

Answer:

                    (d) Physisorption is a process in which adsorbate get adsorbed on the adsorbent surface by weak van der Waals' force of attraction. On increasing temperature the interaction between adsorbate and adsorbent becomes weak and adsorbate particles get desorbed.