Choose the incorrect statement in respect of physisorption? (a) It is not specific in nature (b) ...

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Choose the incorrect statement in respect of physisorption?
(a) It is not specific in nature
(b) It arises because of van der Waal's force
(c) It is reversible in nature
(d) Enthalpy of adsorption is in the range 80-240 Β kJΒ mol^-1

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