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Which of the following statements is inc...

Which of the following statements is incorrect w.r.t. physisorption?

A

The forces involved are van der Waals' forces.

B

More easily liquifiable gases are adsorbed easily .

C

Under high pressure it results into multi - molecular layer on adsorbent

D

`DeltaH_("adsorption")` is low and +ve

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The correct Answer is:
d
: `DeltaH_("adsorption")` is always negative.
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