Mass Transfer
For the same process conditions, the reflux ratio of an unlagged distillation column

Decreases in winter
Increases in summer
None of these
Increases in winter

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Mass Transfer
Plate efficiency

Increases due to liquid entrainment
Increases due to foaming
Increases due to weeping and dumping of liquid
Is a function of the mass transfer between liquid and vapour

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

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