Question

Given below are two statements:
Statement-I: Easily liquefiable gases are readily adsorbed.
Statement-II: Adsorption enthalpy for physisorption is less compared to adsorption enthalpy for chemisorption.
The correct answer is:

• A. Both Statement-I and statement-II are correct
• B. Both Statement-I and statement-II are not correct
• C. Statement-I is correct but statement-II is not correct
• D. Statement-II is correct but statement-I is not correct

Hint:

Physisorption occurs at low temperatures and is reversible, whereas chemisorption involves bond formation and is irreversible.

Answer 1

The Correct Option is A

Step 1: Evaluating Statement-I.
- Gases that can be easily liquefied (like NH\(_3\), CO\(_2\), and SO\(_2\)) have stronger intermolecular forces and are more likely to be adsorbed on solid surfaces.
Thus, Statement-I is correct. Step 2: Evaluating Statement-II.
- Physisorption involves weak van der Waals forces and has lower adsorption enthalpy than chemisorption, which involves stronger chemical bonds.
Thus, Statement-II is correct.