Question

Which is not true about the Freundlich adsorption isotherm curve?

• A. At low pressures, the value of $n=1$
• B. From the $ln\frac{x}{m}$ vs $P$ curve, we can find the value of n by finding the slope
• C. At higher pressures, the value of $\frac{x}{m}$ is almost constant
• D. At a fixed pressure, there is a decrease in physical adsorption with increase in temperature

Answer 1

The correct option is B From the $ln\frac{x}{m}$ vs $P$ curve, we can find the value of n by finding the slope

Mathematical representation of Freundlich isotherm is, $\frac{x}{m}=K{P}^{\frac{1}{n}}$
Graph obtained is $ln\frac{x}{m}$ vs $lnP$ and not $ln\frac{x}{m}$ vs $P$