Mass Transfer
As per Gilliland's equation, the diffusivity is

All of these
Directly proportional to 'T1.5'
Inversely proportional to 'P'
Dependent on the molecular volume & molecular weight of components

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Mass Transfer
Bollman extractor

Is a centrifugal extractor
Is used for extraction of oil from oilseed
Employs only counter-current extraction
Is a static bed leaching equipment

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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.)

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

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