Mass Transfer
Low viscosity absorbent is preferred for reasons of

All of these
Improved flooding characteristics
Rapid absorption rates and good heat transfer characteristics
Low pressure drop on pumping

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

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Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

Total pressure throughout the liquid phase is equal to that throughout the vapor phase
Temperature of the liquid phase is equal to that of the vapor phase
Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase
All of these

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Mass Transfer
Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m² and the solvent flow, rate is 400 moles of S/m². hr. The equilibrium data is represented by Y = 3X² , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is

0.9
0.7
0.5
0.25

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