Mass Transfer
To get high tray efficiency

Gas velocity should be very low
Liquid entrainment should be severe
Time of contact between the two phases should be less
Interfacial surface between liquid and gas phase should be large

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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?

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

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