Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Total
Maximum permissible
Minimum
Operating

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Mass Transfer
In case of an absorber, the operating

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

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