JEE Main 2023 — Surface Chemistry Question with Solution

The equation $\frac{\mathrm{x}}{\mathrm{m}}={\mathrm{KP}}^{1/\mathrm{n}}$ represents Freundlich adsorption isotherm. It is an empirical relationship between the amount of gas adsorbed by a given amount of solid adsorbent surface and pressure of the gas at a particular temperature.

So, Freundlich adsorption isotherm equation is

$\frac{\mathrm{x}}{\mathrm{m}}={\mathrm{KP}}^{1/\mathrm{n}}$

$\Rightarrow \log \frac{\mathrm{x}}{\mathrm{m}}=\mathrm{logK}+\frac{1}{\mathrm{n}}\mathrm{logP}$

Extent of adsorption $\left(\frac{\mathrm{x}}{\mathrm{m}}\right)$ decreases with increase in temperature.

With the help of the above two equation, following plots are obtained