Discussion Forum



1)

The given graph/data I, II, III and IV , represent general trends observed for different Physisorption and chemisorption processes under mild conditions of temperature and pressure' Which of the following choice(s) about I, II, III and IV is (are) correct?

10112021124_k31.PNG

10112021542_k32.PNG


A) I is physisorption and II is chemisorption

B) I is physisorption and III is chemisorption

C) IV is a chemisorption and II is chemisorption

D) IV is chemisorption and III is chemisorption

Answer:

Option A,C

Explanation:

Graph-I represents physisorption as in physisorption, absorbents are bonded to adsorbate through weak van der Waals' force.
Increasing temperature increases the kinetic energy of adsorbed particles increasing the rate of desorption, hence the amount of adsorption decreases.
Graph-III also represents physical adsorption as the extent of adsorption increases with Pressure.
Graph-II represents chemisorption as it is a simple activation energy diagram of a
chemical reaction.
Graph-IV represents, chemisorption as it represents the potential energy diagram
for the formation of a typical covalent bond