Question

What are the molecules which concentrate and accumulate on the surface called?

Answer 1

Adsorption:

• The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed adsorption.
• Adsorption is essentially a surface phenomenon.
• The process of adsorption requires two materials for adsorption to occur that are adsorbate and adsorbent.

Adsorbate:

• The molecular species or substance, which concentrates or accumulates at the surface is termed adsorbate.
• The gases that work as an adsorbate are ${\mathrm{H}}_2,{\mathrm{N}}_2\mathrm{and}{\mathrm{O}}_2$.