Question:
Which of the following assertions about the extent of physisorption is correct?
Which of the following assertions about the extent of physisorption is correct?
Show Hint
Physisorption is exothermic, so it falls as temperature rises.
Updated On: Oct 1, 2026
- Increases with increase in temperature
- Decreases with increase in surface area
- Decreases with increase in the strength of Van der Waals forces
- Decreases with increase in temperature
Show Solution
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The Correct Option is D
Solution and Explanation
Step 1: Recall the facts
Physisorption is caused by weak Van der Waals forces and is exothermic.
Step 2: Check the options
(A) False. By Le Chatelier, raising temperature opposes an exothermic process.
(B) False. A larger surface area increases adsorption.
(C) False. Stronger Van der Waals forces increase adsorption.
(D) True.
Final Answer:
Physisorption decreases with temperature, option (D). \[ \boxed{\text{(D)}} \]
Physisorption is caused by weak Van der Waals forces and is exothermic.
Step 2: Check the options
(A) False. By Le Chatelier, raising temperature opposes an exothermic process.
(B) False. A larger surface area increases adsorption.
(C) False. Stronger Van der Waals forces increase adsorption.
(D) True.
Final Answer:
Physisorption decreases with temperature, option (D). \[ \boxed{\text{(D)}} \]
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