In Langmuir model of isotherm, the adsorption of a gas on a solid surface is:
1
The rate of dissociation of adsorbed molecules from the surface doesnot depend on the surface covered.
2
The mass of gas striking a given area of surface is proportional to the pressure of the gas.
3
The adsorbtion at a single site on the surface may involve multiple molecules at the same time
4
The mass of the gas is independent of the pressure