The adsorbent used in adsorption chromatography is/are:
$A$. silica gel
$B$. alumina
$C$. quick lime
$D$. magnesia
Choose the most appropriate answer from the options given below:

Adsorption is always

Adsorption of a gas follows the Freundlich adsorption isotherm. $x$ is the mass of the gas adsorbed on mass $m$ of the adsorbent. The plot of $\log \frac{x}{m}$ versus $\log p$ is shown in the given graph. $\frac{x}{m}$ is proportional to:

$10 \, mL$ 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?

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

The Freundlich adsorption isotherm varies with temperature according to the figure given below. Choose the correct option accordingly.