Identify the correct examples that clearly illustrate the process of adsorption rather than absorpti — Surface Chemistry Chemistry Question

💡 Solution & Explanation

Anhydrous $CaCl_2$ taking up water vapour and $NH_3$ dissolving in water are examples of absorption (bulk penetration). Silica gel drying air and animal charcoal decolourising molasses are classic examples of adsorption, as the molecules accumulate strictly at the surface.