Question:
Freundlich adsorption isotherm fails at which of the following conditions?
Freundlich adsorption isotherm fails at which of the following conditions?
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Freundlich isotherm is suitable for low to moderate pressures and heterogeneous surfaces.
Updated On: Jun 26, 2026
- High temperature
- Low temperature
- High pressure
- Low pressure
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The Correct Option is C
Solution and Explanation
Step 1: Understand Freundlich isotherm.
It is an empirical relation that assumes adsorption on heterogeneous surfaces.
Step 2: Analyze temperature effect.
High temperature reduces adsorption but Freundlich equation is still valid qualitatively.
Step 3: Analyze pressure effect.
At high pressure, adsorption saturates and the isotherm fails to represent the plateau.
Step 4: Low pressure.
At low pressures, the Freundlich equation works well since adsorption is proportional to pressure.
Step 5: Conclusion.
Freundlich isotherm fails at high pressure.
It is an empirical relation that assumes adsorption on heterogeneous surfaces.
Step 2: Analyze temperature effect.
High temperature reduces adsorption but Freundlich equation is still valid qualitatively.
Step 3: Analyze pressure effect.
At high pressure, adsorption saturates and the isotherm fails to represent the plateau.
Step 4: Low pressure.
At low pressures, the Freundlich equation works well since adsorption is proportional to pressure.
Step 5: Conclusion.
Freundlich isotherm fails at high pressure.
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