Which of the following statements is incorrect regarding physisorptions ?

Question:

Which of the following statements is incorrect regarding physisorptions ?

  1. Under high pressure it results into multi molecular layer on adsorbent surface

  2. Enthalpy of adsorption $\left(\Delta \mathrm{H}_{\text {adsorption }}\right)$ is low and positive

  3. It occurs because of Van der Waal's forces

  4. More easily liquefiable gases are adsorbed readily


Correct Option: , 2

Solution:

$\Delta \mathrm{H}$ is negative

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