Mass Transfer
In case of unsaturated air

Dew point < wet bulb temperature
None of the listed here
Both of the options given here
Wet bulb temperature < dry bulb temperature

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Mass Transfer
Inside the distillation column, the

Driving force for the vapour flow is the pressure drop
Pressure increases gradually from bottom to the top of the column
Liquids are not always at their bubble points
None of these

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