Question

In which one of the following properties, physisorption and chemisorption resemble each other?

• A. Force of attraction
• B. Enthalpy of adsorption
• C. Temperature effect
• D. Effect of surface area
• E. Number of adsorption layers

Answer 1

The correct option is D Effect of surface area

Physical and chemical adsorption resemble only in effect of surface area, as
(a) Force of attraction is more in case of chemical adsorption.
(b) Enthalpy of adsorption is more negative for chemical adsorption.
(c) Chemical adsorption depends on activation energy. Thus, it initially increases then decreases for increase in temperature. While physical adsorption only decreases with the increase in temperature.
(e) Physical adsorption is multilayered while chemical adsorption is single layer adsorption.