Which of the following represents chemisorption? $(x=$ The mass of the adsorbate, $m$ $=$ Mass of the adsorbent)

 

 

 

 

 

Freundlich adsorption isotherm can be expressed by the equation $\frac{\mathrm{x}}{\mathrm{m}}={\mathrm{kp}}^{1/\mathrm{n}}$

Chemisorption increases with time and becomes constant at high temperature. These two conditions are depicted by graphs b and d. 

Hence the correct answer is (C).