Mass Transfer
Chemisorption compared to physical absorption has

Lower capacity of the solvent for the solute gas
Lower adsorption rate
Increased utilisation of stagnant zones of the liquid phase
None of these

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Mass Transfer
The term "approach" in a cooling tower refers to the difference in the temperature of the

Hot water entering and the cooled water leaving the cooling tower
None of these
Hot water entering the tower and the wet bulb temperature of the surrounding air
Cold water leaving the tower and the wet bulb temperature of the surrounding air

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Mass Transfer
Steam distillation is not recommended to be used, if the

Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature
Liquids decompose, if distilled directly at atmospheric pressure
Azeotropic mixture is to be separated and the final product is miscible with water
Material can not be distilled by indirect heating even under low pressure, because of the high boiling temperature

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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?

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

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