Question
Which of the following statements are false?
A. Freundlich adsorption isotherm holds good for all pressure ranges.
B. The force of attraction existing between the adsorbate and adsorbent are Vander Waal’s forces in case of chemisorption.
C. Adsorption is an endothermic process.
D. The extent of adsorption decreases with increase in temperature for a physiosorption process.
A. Freundlich adsorption isotherm holds good for all pressure ranges.
B. The force of attraction existing between the adsorbate and adsorbent are Vander Waal’s forces in case of chemisorption.
C. Adsorption is an endothermic process.
D. The extent of adsorption decreases with increase in temperature for a physiosorption process.
Answer: Option B
:
B
A. Freundlich isotherm doesn't hold good at high pressures as it seems to attain saturation at high pressure.
B. Vander Waal's forces exit in case of physiosorption; in chemisorption chemical bonds are formed.
C. Adsorption is an exothermic process, as adsorption process is followed by release of heat.
D. This statement is true. Since adsorption is an exothermic process, so Le chatelier's principle explains this property.
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:
B
A. Freundlich isotherm doesn't hold good at high pressures as it seems to attain saturation at high pressure.
B. Vander Waal's forces exit in case of physiosorption; in chemisorption chemical bonds are formed.
C. Adsorption is an exothermic process, as adsorption process is followed by release of heat.
D. This statement is true. Since adsorption is an exothermic process, so Le chatelier's principle explains this property.
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