Mass Transfer
Stage efficiency in a leaching process depends on the

Vapour pressure of the solution
Rate of diffusion of the solute through the solid and into the liquid
Time of contact between the solid and the solution
Both A & B

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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 can be either above or below the equilibrium curve
Line always lies below the equilibrium curve

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