A) the adsorption takes place in multilayers
B) the adsorption sites are equivalent in their ability to adsorb the particles
C) the heat of adsorption varies with coverage
D) the adsorbed molecules interact with each other
Correct Answer: A
Solution :
| The main postulates of Langmuir's theory of adsorption are as: |
| (i) Adsorption takes place on the surface of the solid only till the whole of the surface is completely covered with a unimolecular layer of the adsorbed gas. This suggests all the adsorption sites present on solids surface are equivalent in their ability to adsorb the particles. |
| (ii) Adsorption consist of two opposing processes [a] condensation and [b] evaporation. |
| (iii) The rate of condensation depend upon the uncovered surface of the adsorbent available for condensation. |
You need to login to perform this action.
You will be redirected in
3 sec
