_ When adsorption hysteresis is observed, the desorption equilibrium p – McqOptions

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1.	_ When adsorption hysteresis is observed, the desorption equilibrium pressure is __________ that obtained by adsorption.$?
A.	Always lower than
B.	Always higher than
C.	Same as
D.	Dependent on the system; can be either lower or higher than
Answer» B. Always higher than

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