Mass Transfer
Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture.

Unbound
None of these
Bound
Critical

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Mass Transfer
Priming in a distillation column

Is desirable from point efficiency consideration
Results from very low gas velocity
Is characterised by the presence of foam throughout the space between trays
Reduces the overall pressure drop

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

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