Stoichiometry
In physical adsorption, as compared to chemisorption, the

Quantity adsorbed per unit mass is higher
Rate of adsorption is controlled by the resistance to surface reaction
Heat of adsorption is very large
Activation energy is very high

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Stoichiometry
In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B

Exhibits positive deviation from Raoult's law
Obeys Raoult's law
May exhibit either positive or negative deviation from Raoult's law
Exhibits negative deviation from Raoult's law

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