Adsorption of gases on a solid surface is generally exothermic because

If the value of $\frac{1}{n}$ is equal to $1$ in the Freundlich adsorption isotherm,then $\frac{x}{m} = $ (where $x = $ mass of adsorbate,$m = $ mass of the adsorbent,$p = $ pressure of the gas).

$0.2 \ g$ of fine animal charcoal is mixed with half a litre of acetic acid solution and shaken for $30 \ minutes$. What happens to the concentration of the solution?

The rate of physical adsorption:

Which type of adsorption leads to the formation of a multimolecular layer?

For Freundlich adsorption isotherm,a graph of $\log (x / m)$ vs $\log (p)$ gives a straight line. The slope of the line and its $Y$-axis intercept respectively are