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Mass Transfer

Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

5
2.5 to 3
1.2 to 1.5
3 to 4

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Mass Transfer
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

Neither A nor B
Constant rate
Unsaturated surface
Both A & B

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.

Surface-renewal
Penetration
Film
None of these

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Mass Transfer
For a binary mixture distillation process, the degree of freedom is 2. However, if the pressure is fixed in this process, the number of independent variables in this process will be

1
2
3

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Mass Transfer
COâ‚‚ can be absorbed by

Heated charcoal
Cold Ca(OH)â‚‚
Hot cupric oxide
Alumina

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Mass Transfer
Reverse osmosis is also called

Ultrafiltration
Diffusion
Dialysis
Electrodilysis

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