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Mass Transfer

Mass Transfer
Degree of freedom for leaching and solvent extraction process is

1
2
3

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Mass Transfer
Molecular seives are porous

Synthetic zeolites crystals/metal alumino-silicates
Silica
Alumina
None of these

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Mass Transfer
_______ number indicates the ratio of the rates of the heat and mass transfer incase of a cooling tower.

Lewis
Stanton
Sherwood
Peclet

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Mass Transfer
Drying operation under vacuum is carried out to

Reduce drying temperature
Increase drying temperature
Dry materials having high bound moisture content
Dry those materials which have very high unbound mositure content

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Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.215
0.017
0.31
0.107

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

1/D
D
D0.5
D2

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