Which of the following statements is true with respect to the types of adsorption?

Chemisorption is stronger than physisorption

The correct answer is option 1. Chemisorption is stronger than physisorption.

Chemisorption: This type of adsorption involves chemical bonds forming between the adsorbate (the substance being adsorbed) and the adsorbent (the surface on which adsorption occurs). These bonds are typically covalent or ionic in nature, resulting in a strong attachment between the adsorbate and the surface. Since chemical bonds are stronger than the relatively weak van der Waals forces involved in physisorption, chemisorption tends to be stronger.

Physisorption: Also known as physical adsorption, physisorption involves the adsorption of molecules onto a surface through weak van der Waals forces such as dispersion forces, dipole-dipole interactions, and hydrogen bonding. These forces are relatively weaker compared to the chemical bonds formed in chemisorption. As a result, physisorption is typically weaker than chemisorption.

In summary, chemisorption involves stronger chemical bonds, making it stronger than physisorption, which relies on weaker physical interactions. Therefore, the statement "Chemisorption is stronger than physisorption" is true.