How does chemisorption change with an increase in temperature?

Two statements are given below.
Statement-$I$: Adsorption of a gas on the surface of charcoal is primarily an exothermic reaction.
Statement-$II$: $A$ closed vessel contains $O_2, H_2, Cl_2, NH_3$ gases. Its pressure is $P \ atm$. About $1 \ g$ of charcoal is added to this vessel and after some time its pressure was found to be less than $P \ atm$.
The correct answer is:

The shape of the adsorption isobar for physical adsorption and the adsorption isobar for chemisorption, respectively, are:

Which one of the following graphs represents the Freundlich adsorption isotherm?

What type of phenomenon is adsorption? What type of reaction is adsorption?

In chromatography,which of the following statements is incorrect for $R_f$?