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Mass Transfer

Mass Transfer
H₂S present in naphtha reformed gas is removed by absorbing with

K₂CO₃
Ethanolamine
Vacuum gas oil
HCl

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Mass Transfer
The drying time between fixed moisture contents within the 'constant rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

T
T1.5
√T
T3

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Mass Transfer
In McCabe-Thiele method of theoretical plate calculation for a distillation column, the operating lines of stripping and rectifying sections coincide with the diagonal at __________ reflux.

Maximum permissible
Total
Operating
Minimum

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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

1.04
1.24
0.54
1.94

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Mass Transfer
Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.

Physical properties
Interfacial area
Degree of turbulence
Chemical properties

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Mass Transfer
Which of the following is an undesirable property in a tower packing?

Large surface per unit volume
Large weight of liquid retained
Large free cross-section
Low weight per unit volume

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