What is the difference when a concentrated solution of$\mathrm{KCl}$ is shaken with blood charcoal in one case and a dilute solution of $\mathrm{KCl}$ in the second case?

Given:



On the basis of data given above, predict which of the following gases shows the least adsorption on a definite amount of charcoal?

Define the following term : Adsorbent

The mass of gas adsorbed, $\mathrm{x}$, per unit mass of adsorbate, $\mathrm{m}$, was measured at various pressures, $\mathrm{p}.$A graph between $\log \frac{\mathrm{x}}{\mathrm{m}}$ and $\log \mathrm{p}$ gives a straight line with slope equal to $2$ and the intercept equal to $0.4771$. The value of $\frac{\mathrm{x}}{\mathrm{m}}$ at a pressure of $4 \mathrm{atm}$ is :

(Given $\log 3=0.4771$)

$2.0 \mathrm{g}$ of ${\mathrm{H}}_{2 }\mathrm{gas}$ is adsorbed on $2.5 \mathrm{g}$ of platinum powder at $300 \mathrm{K}$ and $1$ bar pressure. The volume of the gas adsorbed per gram of the adsorbent is $\mathrm{mL}$

(Given : $\mathrm{R}=0.083 \mathrm{L}$ bar ${\mathrm{K}}^{-1}{ \mathrm{mol}}^{-1}$)

Write three differences between adsorption and absorption.

$3.12 \mathrm{g}$ of oxygen is adsorbed on $1.2 \mathrm{g}$ of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at $1 \mathrm{atm}$ and $300 \mathrm{K}$ in $\mathrm{L}$ is            

$\left[\mathrm{R}=0.0821 \mathrm{L} \mathrm{atm} {\mathrm{K}}^{-1} {\mathrm{mol}}^{-1}\right]$