Which of the following is not a favourable condition for physical adsorption?

If $x$ gram of gas is adsorbed by $m$ gram of adsorbent at pressure $P$,the plot of $\log \frac{x}{m}$ versus $\log P$ is linear. The slope of the plot is: ($n$ and $k$ are constants and $n > 1$ )

Compare the enthalpy of chemical adsorption with physical adsorption.

Which of the following is not a characteristic of chemisorption?

According to the Langmuir adsorption isotherm,the amount of gas adsorbed at very high pressures:

When $H_2S$ gas is passed through an arsenious oxide solution,an arsenious sulphide sol is formed. The charge on the particles is due to the adsorption of .......