Question

According to Freundlich adsorption isotherm at high pressure, the value of $\frac{x}{m}$ is

• A. directly proportional to pressure
• B. inversely proportional to pressure
• C. directly proportional to square of pressure
• D. independent of pressure

Answer 1

Answer: (D)

At high pressure, the extent of adsorption $\left(\frac{x}{m}\right)$ becomes constant as the adsorbent surface is saturated with the adsorbate.
Hence, $\frac{x}{m}$ becomes independent of pressure.
Mathematically, $\frac{x}{m}=k{p}^{\circ }$.