Mass Transfer
Chemisorption compared to physical absorption has

Increased utilisation of stagnant zones of the liquid phase
Lower adsorption rate
None of these
Lower capacity of the solvent for the solute gas

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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

0.25
0.9
0.7
0.5

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