Mass Transfer
Which of the following is the most suitable for extraction in a system having very low density difference?

Packed extraction tower
Pulsed extractor
Mixer-settler extractor
Centrifugal extractor

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Mass Transfer
Dew point of an air-water vapor mixture

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
All of the listed here
Decreases with decrease in pressure
At constant humidity & total pressure is fixed

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