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  • Which statement is correct?Option: 1 Physical adsorption is multi-layer, non- directional and non-specific<stro

Which statement is correct?

Option: 1

Physical adsorption is multi-layer, non- directional and non-specific


Option: 2

Chemical adsorption is unilayer


Option: 3

Chemical adsorption is more stronger than physical adsorption


Option: 4

All of above


Answers (1)

best_answer

Physical adsorption of a gas by a solid is generally reversible. Thus solid+gas \rightleftharpoons gas/solid + heat 
the extent of adsorption changes with changes in pressure and temperature. So, physical adsorption is multi-layer, non-directional, and non-specific.

Chemical adsorption is unilayer due to layer form because of the reaction. Chemical adsorption is stronger than physical adsorption due to strong forces between adsorbate and adsorbent.

So, All are correct.

Posted by

Ritika Harsh

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