Which of the following statements is $NOT$ applicable to chemisorption?

Which one of the following statements is not correct?

The charge on colloidal particles is due to

At high pressure,the entire surface is covered by a unimolecular layer of gas,which follows ......... order.

If $x$ is the amount of adsorbate and $m$ is the amount of adsorbent,which of the following relations is not related to the adsorption process?

In the Freundlich isotherm $\frac{x}{m}=k p^{\frac{1}{n}}$ plot of $\log \frac{x}{m}$ vs $\log p$,the intercept is (where,$x$,$m$,$p$ and $k$ are mass of the gas,mass of adsorbent,pressure and constant which depend on the nature of the adsorbent,respectively)