Which one is the irreversible adsorption?

$10 \, mL$ 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?

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)

Regarding the adsorption of a gas on the surface of a solid,which of the following is $NOT$ true?

Between water and an $NaCl$ solution,which will have a higher surface tension? (Effect of solute on surface tension)

In a plot of $\log \left( \frac{x}{m} \right)$ $vs$ $\log p$,for the adsorption of a gas on a solid,a straight line is obtained. The slope of that straight line is