Question

Which of the following is not true for Freundlich adsorption isotherm?

• A. $\frac{x}{m}=k{P}^{\frac{1}{n}}$ x is mass of the gas absorbed on mass m of the adsorbent at pressure P.
• B.
• C. The factor $\frac{1}{n}$ can have values between 0 and 1
• D. When $\frac{1}{n}=0$, the adsorption varies directly with pressure

Answer 1

The correct option is D When $\frac{1}{n}=0$, the adsorption varies directly with pressure

When $\frac{1}{n}=0,\frac{x}{m}=$ constant, the adsorption is independent of pressure
When $\frac{1}{n}=1,\frac{x}{m}=kP,i.e.\frac{x}{m}\propto P$, the adsorption varies directly with pressure.