The extent of adsorption of a gas depends upon the

Options

A. nature of the adsorbate
B. nature of the adsorbent
C. specific area of the adsorbent
D. All of these

Answer

D

Explanation

In general, easilly liquefiable gases (i.e. with higher critical temperatures) are readily adsorbed as the strengh of van der Waals' forces is directly related to the value of critical temperature. Thus adsorption of vapors (e.g `H_(2)O`) is more than of permannent gases (e.g. `H_(2),O_(2),N_(2)` etc). Most common adsorbent are activated charcaol, metal oxides (silica gel and aluminium gel) and clay. Each of these possess porus structure.
Specific area of an adsorbing solid is the surface area per gram of the adsorbent. THe greater the spcific area of the solid, the greater would be its adsorbing capacity.