What is the main difference between physisorpton and chemisorption ?

Answer

Difference between physical adsorption and chemical adsorption
`{:("Physical Adsorption",,,"Chemical Adsorption"),(1. "The forces between the adsorption molecules and the adsorption are weak van der Waals' forces".,,,"The forces between the adsoption molecules and the adsorption are strong chemical forces".),(2."Low heat of adsorption of the order of" 20-40 kJ mol^(-1),,,"High hest of adsorption of the order" 200-400 kJ mol^(-1)),(3. "Usually occurs at low temperature and decreases with increasing temperature".,,,"It occurs at high temperature".),(4."The extent of adsorption depends upon the ease of liquefication of the gas".,,,"There is no correlation between extent of adsorption and the ease of liquefication of gas".),(5."It is less specific in nature" "," "all gases are adsorbed on the surface of a solid to some extent".,,,"It is highly specific in nature and occurs only when there is bond formation between adsorption and adsorbate molecules".),(6."It forms multimolecular layers".,,,"It forms mono-molecular layer".),(7. "extent of adsorption (x//m) increases with pressure".,,,"extent of adsorption (x//m) increases with pressure"):}`