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Problem 2 - Olympiad
The Langmuir adsorption isotherm assumes that:
A. Multiple layers of adsorbate form on the surface
B. The adsorbent surface is non-uniform
C. Adsorption is an irreversible process
D. Each adsorption site can accommodate only one gas molecule
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Correct: D
Langmuir's model is based on the concept of a monomolecular layer of adsorbed gas, assuming uniform surface and no interaction between adsorbed molecules.