Wood charcoal is used to decolourise sugar because it

According to the Freundlich adsorption isotherm,which of the following is correct?

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

Which of the following statements is correct?

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.

The force of attraction present in physical adsorption is ....