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 ; there won
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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Mass Transfer
Relative humidity is the ratio of the

Partial pressure of the vapour to the vapour pressure of the liquid at room temperature
Actual humidity to saturation humidity
Partial pressure of the vapour to the vapour pressure of the liquid at gas temperature
None of these

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Mass Transfer
In an operating distillation column, the

Driving force for the liquid flow is its specific weight
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

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