Mass Transfer
Which of the following psychrometric processes is followed by water vapour laden unsaturated air, when it is passed through solid or liquid adsorbent?

Dehumidification with dry bulb temperature remaining constant
Cooling and dehumidification
None of these
Heating and dehumidification at almost constant wet bulb temperature

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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

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

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