Mass Transfer
Overall efficiency of the distillation column is

The ratio of number of actual plates to ideal plates
Always more than the point efficiency
Same as the Murphree efficiency
The ratio of number of ideal plates to actual plates

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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
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
Pr = Sc ; there won

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

Door classifier can be used for leaching of coarse solids
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor
Fine solids can not be leached in a Pachuka tank
Very high temperature is not needed for the leaching of sugar beet

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