Which of the following gases is readily adsorbed by solid adsorbent?

Select the graph that correctly describes the adsorption isotherms at two temperatures $T_{1}$ and $T_{2}$ $\left(T_{1}>T_{2}\right)$ for a gas :
($x-$ mass of the gas adsorbed ; $m-$ mass of adsorbent ; $P -$ pressure)

$10 \, mL$ of $1 \, mM$ surfactant solution forms a monolayer covering $0.24 \, cm^2$ on a polar substrate. If the polar head is approximated as a cube, what is its edge length?

The Langmuir adsorption isotherm is deduced using the assumption that:

Which graph represents the amount of chemisorption of a gas with temperature under constant pressure?

For Freundlich adsorption isotherm,a plot of $\log (x / m)$ ($y$-axis) and $\log p$ ($x$-axis) gives a straight line. The intercept and slope for the line is $0.4771$ and $2,$ respectively. The mass of gas,adsorbed per gram of adsorbent if the initial pressure is $0.04 \ atm,$ is $........\times 10^{-4} \ g$.
$(\log 3 = 0.4771)$