Choose the correct statement for chemical adsorption.

The critical temperatures of some gases are given. Which gas shows the least adsorption on a definite amount of charcoal?

Gas	Critical Temperature
$A$	$304 \ K$
$B$	$630 \ K$
$C$	$200 \ K$
$D$	$540 \ K$

Two compounds $I$ and $II$ are eluted by column chromatography (adsorption of $I > II$). Which one of the following is a correct statement?

$CH_4$ is adsorbed on $1 \ g$ charcoal at $0^{\circ} C$ following the Freundlich adsorption isotherm. $10.0 \ mL$ of $CH_4$ is adsorbed at $100 \ mm$ of $Hg$,whereas $15.0 \ mL$ is adsorbed at $200 \ mm$ of $Hg$. The volume of $CH_4$ adsorbed at $300 \ mm$ of $Hg$ is $10^x \ mL$. The value of $x$ is $....\times 10^{-2}$ (Nearest integer). [Use $\log_{10} 2=0.3010, \log_{10} 3=0.4771$]

If $x$ is the mass of the gas adsorbed on mass $m$ of the adsorbent at pressure $p,$ Freundlich adsorption isotherm gives a straight line on plotting

Adsorption is multilayer in case of