Mass Transfer
Dew point of an air-water vapor mixture

Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve
Decreases with decrease in pressure
At constant humidity & total pressure is fixed
All of the listed here

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Mass Transfer
The relation among various mass transfer co-efficients (M.T.C) for ideal gases is given by (where, Kc & Km are M.T.C. for equimolar counter diffusion with concentration & mole fraction respectively as the driving force. and, Kp = M.T.C. for diffusion of a gas through a stagnant inert gas with pressure as driving force.)

Kc = Kp = Km
None of these
Kc = Kp . RT = Km . RT/p
Kc = Kp/RT = Km . RT/P

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