Adsorption 
Adsorption of gases on solid surface is exothermic because:
If the adsorption is due to the weak van der waals forces between adsorbent and adsorbate, it is termed as
The amount of gas adsorbed on a solid surface
The continuous zig-zag movement of colloidal particles in a dispersion medium is called
In Freundlich adsorption isotherm, the value of 1/n is: