The rate of physical adsorption:

The substance used to decolourise and purify oils is

What is the value of the slope in the Freundlich adsorption isotherm plot of $\log \frac{x}{m}$ against $\log C$?

Which of the following assertions about the extent of physisorption is correct?

Plot of $\log \left( \frac{x}{m} \right)$ against $\log P$ is a straight line inclined at an angle of $45^o$. When the pressure is $0.5 \ atm$ and Freundlich parameter,$k$ is $10$,the amount of solute adsorbed per gram of adsorbent will be ...... $g$ $(\log 5 = 0.6990)$

What type of the graph $\log(x/m)$ vs $\log P$ is obtained for the Freundlich adsorption isotherm?