A particular adsorption process has the following characteristics : (i) It arises due to van der Waals forces and (ii) it is reversible. Identify the correct statement that describes the above adsorption process :

Question

$\begin{array}{1 1}(1) \text{Enthalpy of adsorption is greater than} 100\; kJ\; mol^{−1} \\ (2) \text{ Energy of activation is low.} \\ \text{ (3) Adsorption is monolayer.} \\ \text{ (4) Adsorption increases with increase in temperature.} \end{array}$