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Mass Transfer

Mass Transfer
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

D0.5
D2
1/D
D

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Mass Transfer
Leaching of uranium ore and gold ore is done in

Bollman extractor
Pachuka tanks
Centrifugal extractor
None of these

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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
T3
T
T1.5

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Mass Transfer
The unit of volumetric diffusivity is

Cm/sec
Cm²/seC₂
Cm²/sec
Cm³/sec

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Mass Transfer
In McCabe-Thiele method, at infinite reflux ratio

Both the operating lines coincide with diagonal
Both A & B
Neither A nor B
The overhead product is minimum

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Mass Transfer
Flash distillation is suitable for separating the constituents of a binary system, which

Form constant boiling azeotrope
Have very wide boiling points
Form minimum boiling azeotrope
Have very close boiling points

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