Select the correct observation in the following isotherm:

$\text{ (where, }\frac{\mathrm{x}}{\mathrm{m}}=\text{ amount of the adsorbate adsorbed per gram of the adsorbent) }$

This represents Freundlich's adsorption isotherm.

$\left(1\right) \text{ Along }\mathrm{XY}\cdot \left(\frac{\mathrm{x}}{\mathrm{m}}\right)\propto {\mathrm{p}}^0=\text{ constant. Thus, correct. }$

(2) When point X is reached, saturation is attained (there is no further adsorption), hence desorption may start. Thus, correct.

(3) $\left(\frac{\mathrm{x}}{\mathrm{m}}\right)\propto (\mathrm{p}{)}^{1/\mathrm{n}}\text{ along }\mathrm{OX}\text{. Thus, correct. }$