Mass Transfer
Which one of the following devices is not used for both the absorption as well as the liquid-liquid extraction processes?

Spray towers
Packed towers
Plate towers
Wetted wall columns

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Mass Transfer
In case of absorption with exothermic reaction, for fluids having

Pr = Sc = 1; total mass, momentum and thermal diffusivity will be the same
Pr = Sc ; there won
Both A & B
Pr = Sc; percentage change in heat and mass transfer flux will be the same for a given change in the degree of turbulence

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