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The correct statements from the followin...

The correct statements from the following about physical adsorption
I) desorption of adsorbate gas from adsorbent is not easy since chemical forces are involved
II) Its energy of activation is very low.
III)Easily liquifiable gases are more readily adsorbed. 

A

all are correct

B

only (II) and (III)

C

only (I) and (III)

D

only I and II

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the correct statements about physical adsorption, we will analyze each statement one by one. ### Step 1: Analyze Statement I **Statement I:** Desorption of adsorbate gas from adsorbent is not easy since chemical forces are involved. **Analysis:** This statement is incorrect. In physical adsorption, the forces involved are weak van der Waals forces, not strong chemical bonds. As a result, desorption (the process of the adsorbate leaving the adsorbent) is relatively easy because the weak forces can be overcome with minimal energy input. ### Step 2: Analyze Statement II **Statement II:** Its energy of activation is very low. **Analysis:** This statement is correct. Physical adsorption typically occurs at low temperatures and requires low activation energy. The weak interactions allow molecules to adhere to the surface without the need for significant energy. ### Step 3: Analyze Statement III **Statement III:** Easily liquifiable gases are more readily adsorbed. **Analysis:** This statement is also correct. Easily liquifiable gases have stronger intermolecular forces and can interact more effectively with the surface of the adsorbent, leading to higher adsorption. ### Conclusion From the analysis: - Statement I is incorrect. - Statement II is correct. - Statement III is correct. Thus, the correct statements about physical adsorption are **II and III**. ### Final Answer: The correct statements about physical adsorption are: - II) Its energy of activation is very low. - III) Easily liquifiable gases are more readily adsorbed. ---
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