Mass Transfer
Chemisorption (chemical adsorption) is

A reversible phenomenon
Same as "Van der Waals" adsorption
Characterised by adsorption of heat
An irreversible phenomenon

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Mass Transfer
Which of the following processes is not an example of adsorption applied to gaseous separations?

Recovery of valuable solvent vapors from dilute mixture with air and other gases
Dehumidification of air and gas
Removal of objectionable odour and impurities from industrial gases
Decolouration of yellow glycerene

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Mass Transfer
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Partial pressure of component A to the total pressure
Vapour pressure of component A to the total pressure
Vapour pressure of component A to the partial pressure of A
Vapour pressure of component A to that of component B

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