Which of the following statements is incorrect regarding physisorption?

  • A
    It occurs because of van der Waals forces.
  • B
    More easily liquefiable gases are adsorbed readily.
  • C
    Under high pressure it results into multi-molecular layer on adsorbent surface.
  • D
    Enthalpy of adsorption $(\Delta H_{adsorption})$ is low and positive.

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