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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)

1/D
D2
D
D0.5

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Mass Transfer
If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are

Both A & B
Parallel
Neither A nor B
Straight

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Mass Transfer
Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

≤ 1
1
> 1
< 1

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Mass Transfer
Ion exchange process is similar to

Absorption
Extraction
Adsorption
Leaching

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Mass Transfer
Make up water is required in a cooling tower to replace the water lost by

Drift
All of these
Evaporation
Blowdown and leakage

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Mass Transfer
The ratio of Murphree plate efficiency to point efficiency is 1 in a __________ flow model.

Plug
Perfectly mixed
Both plug & perfectly mixed
None of the listed here

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