Mass Transfer
With increase in temperature, the rate of leaching increases, because the

Thermal conductivity of solute increases
None of these
Viscosity of solvent decreases
Diffusivity of solute increases

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Mass Transfer
Plate efficiency

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

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