When is the term 'sorption' used?

If the value of $\frac{1}{n}$ is equal to $1$ in the Freundlich adsorption isotherm, then $\frac{x}{m} = $ (where $x = $ mass of adsorbate, $m = $ mass of the adsorbent, $p = $ pressure of the gas).

Explain the phenomenon that involves solutes from solution being adsorbed on solid adsorbents.

Which gas is adsorbed to a greater extent on activated charcoal?

What is the role of activated charcoal in gas masks used in coal mines?

Which of the following is true for the adsorption of $Krypton$ on the surface of activated charcoal at low temperature?