In Freundlich adsorption isotherm at moderate pressure,the extent of adsorption $\left(\frac{x}{m}\right)$ is directly proportional to $P^x$. The value of $x$ is

The Freundlich adsorption isotherm gives a straight line on plotting:

Which of the following properties belongs to physical adsorption?

Assertion : $NH_3$ is absorbed more readily over activated charcoal than $CO_2$.
Reason : $NH_3$ is non-polar.

Why does physisorption decrease with the increase of temperature?

$50 \ mL$ of $1 \ M$ oxalic acid is shaken with $0.5 \ g$ of wood charcoal. The final concentration of the solution after adsorption is $0.5 \ M$. The amount of oxalic acid adsorbed per $g$ of charcoal is ....... $g$.