Question

How many of the following are characteristics of physisorption?
a. Weak attractive interactions between adsorbate and adsorbent
b. Monolayer formation of adsorbent on adsorbate
c. Remains unaffected by change of temperature
d. Decreases with increase of temperature
e. It is also known as activated adsorption

Answer 1

Answer: 2

There are five statements in the question we will check all the statements one by one whether it is correct or not.
STATEMENT $\left(a\right)$ — It is correct because there are weak Van der Waal's forces of attraction between adsorbate and adsorbent.
STATEMENT $\left(b\right)$ — It is an incorrect statement because physisorption is multilayer formation of adsorbate on adsorbent.
STATEMENT $\left(c\right)$ — It is incorrect because as physisorption is dependent upon temperature.
STATEMENT $\left(d\right)$ — It is correct because physisorption decreases with increase of temperature.
STATEMENT $\left(e\right)$ — It is incorrect because chemisorption is also known as activated adsorption, not physisorption.