1.

What is difference between physical adsorption and chemical adsorption ? 

Answer»

Difference between physical adsorption and chemical adsorption:–

Physical Adsorption Chemical Adsorption 
(i) It is caused by intermolecular vanderwaal forces. (i) It is caused by chemical bond formation. 
(ii) It is not specific. (ii) It is specific. 
(iii) It is favourable at low temperature. It decreases with increase of temperature. (iii) It is favourable at high temperature. It increases with increase of temperature. 
(iv) No involvement of activtion energy. (iv) High activation energy is needed. 
(v) High pressure increases it. Decrease in pressure causes desorption.(v) High pressure increases it. But no effect on decreasing pressure 
(vi) It forms multilayer at the absorbent. (vi) It forms unilayer at absorbent. 



Discussion

No Comment Found

Related InterviewSolutions