Mass Transfer
As the reflux ratio increases, the slope of the operating line for rectifying section

Data insufficient, cannot be predicted
Decreases
Remains constant
Increases

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Mass Transfer
Dew point of an air-water vapor mixture

Decreases with decrease in pressure
All of the listed here
At constant humidity & total pressure is fixed
Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve

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