Mass Transfer
When a multistage tray tower uses a minimum reflux ratio, it implies

Minimum trays and minimum reboiler heat load
Infinite trays and maximum reboiler heat load
Minimum trays and maximum reboiler heat load
Infinite trays and minimum reboiler heat load

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Mass Transfer
In case of an absorber, the operating

Line always lies above the equilibrium curve
Velocity is more than the loading velocity
Line always lies below the equilibrium curve
Line can be either above or below the equilibrium curve

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Mass Transfer
Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled

And humidified
And dehumidified with increase in wet bulb temperature
At the same relative humidity
And dehumidified with decrease in wet bulb temperature

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