Mass Transfer
Flooding in a vapor-liquid contacting equipment occurs in a tray, when the pressure drop through a tray is __________ the liquid head available in the downcomer.

More than
Less than
Very much less
Same as

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Mass Transfer
For absorbing a sparingly soluble gas in a liquid

Mass transfer co-efficient must be kept constant
Liquid side mass transfer co-efficient should be increased
Liquid side mass transfer co-efficient should be decreased
Gas side mass transfer co-efficient should be increased

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Mass Transfer
The rate of solid-liquid extraction is limited by the

Diffusion of the solute through the solvent in the pores to the outside of the particle
Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution
Phase change of the solute as it dissolves in the solvent
All of these

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