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Mass Transfer

Mass Transfer
__________ columns are used for liquid dispersion in a continuous gas phase.

Packed
Pulse
Bubble cap
Sieve plate

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Mass Transfer
A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

1.94
1.04
1.24
0.54

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Mass Transfer
Absorption factor is defined as (where, S₁ = slope of the operating line S₂ = slope of the equilibrium curve)

S₁ x S₂
S₂/S₁
S₁ - S₂
S₁/S₂

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Mass Transfer
Plate efficiency in a distillation column is reduced due to the __________ of liquid.

Foaming
Entrainment
All of these
Weeping & dumping

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Mass Transfer
Low viscosity absorbent is preferred for reasons of

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

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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.

Very much less
Less than
More than
Same as

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