Question

On the basis of Langmuir adsorption isotherm, the amount of gas adsorbed at very high pressure:

• A. reaches a constant limiting value
• B. goes on increasing with pressure
• C. goes on decreasing with pressure
• D. first increasing and then decreasing with pressure

Answer 1

The correct option is A reaches a constant limiting value

Langmuir adsorption isotherm deals in terms of chemical adsorption which fails at high pressure because the mas adsorbed reaches a constant value when the adsorbed surface is completely covered by a unimolecular layer of gases.

Hence, option A is correct.