Physical adsorption is essentially quite appreciable:

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

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Amongst $He$,$Ne$,$Ar$ and $Kr$; $1 \ g$ of activated charcoal adsorbs more of $Kr$.
Reason $R$: The critical volume $V_c \left( cm^3 \ mol^{-1} \right)$ and critical pressure $P_c \left( atm \right)$ is highest for Krypton but the compressibility factor at critical point $Z_c$ is lowest for Krypton.
In the light of the above statements,choose the correct answer from the options given below.

When a dilute aqueous solution of $AgNO_3$ (excess) is added to $KI$ solution,positively charged sol particles of $AgI$ are formed due to the adsorption of which ion?

Which of the following statements is false during the adsorption of gas molecules on a metal surface?

Explain the following terms related to Adsorption Chromatography:
$(a)$ Principle of Adsorption chromatography.
$(b)$ Adsorbent.
$(c)$ Mobile phase.
$(d)$ Adsorbate.