| Assertion : The enthalpy of physisorption is greater than chemisorption. |
| Reason : Molecules of adsorbate and adsorbent are held by van der Waals forces in physisorption and by chemical bonds in chemisorption. |
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: E
Solution :
Assertions is false but reason is true. The enthalpy of chemisorption is of the order of \[200\ kJmo{{l}^{-1}}\]while for physical adsorption it is of the order of \[20\ kJmo{{l}^{-1}}\].
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