Question

Which of the following statements is incorrect regarding physical adsorption?

• A. It occurs because of van der Waal's 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 $\left(\Delta H_{adsorption}\right)$ is low and positive.

Answer 1

Answer: (B)

More easily liquefiable gases are adsorbed readily.

Properties of physical adsorption-

$i)$ It occurs through the formation of bonds by van der Waal's forces.

$ii)$ Enthalpy of adsorption is low and positive.

$iii)$ Under high pressure, it results in a multilayer phenomenon.

Hence, Option $B$ is the correct answer.