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

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

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Mass Transfer
At equilibrium the concentration of water in vapour phase (C*)in kg/m³ of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m³ containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is

0.4
0.2
1

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Mass Transfer
In an operating distillation column, the

Highest temperature is encountered at the top of the column
Vapors and liquids are at their dew point and bubble point respectively
Driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column
Driving force for the liquid flow is its specific weight

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