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Comparison of Physisorption and Chemisorption

Which of the ...

Question

Which of the following statements is/are true for physisorption?

A

Extent of adsorption increases with increase in pressure.

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B

It needs activation energy.

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C

It can be reversed easily.

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D

It occurs at high temperature.

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Solution

The correct options are
A Extent of adsorption increases with increase in pressure.
C It can be reversed easily.
In physisorption, the amount of adsorption decreases with the increase of temperature and increases with the increase of pressure.
Also, physisorption happens due to weak attraction forces like van der Waals forces so, it can be reversed easily. Generally, it occurs at low temperature.

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