Surface ChemistryHard

Question

Which of the following statement(s) is/are incorrect regarding activated adsorption?

Options

A.Its extent increases with increase in pressure and it may change to multilayer adsorption at high pressure.

B.Its extent increases with decrease in temperature and it may change to multilayer adsorption at low temperature.

C.Its extent increases with increase in surface area of adsorbent.

D.When oxygen is adsorbed at graphite surface, none of the gas leaves the surface on strong heating.

Solution

(a) Chemisorption does not change into physisorption at higher pressure.

(b) CO or CO₂ gases leave the surfaces.

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