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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
> 1
< 1
0.5

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Mass Transfer
At what value of reflux ratio, number of theoretical plates in a distillation column is minimum?

< 1
∞
1

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Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ 1/P0.5
D ∝ 1/P1.5
D ∝ P0.5
D ∝ 1/P

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Mass Transfer
The most economical range of absorption factor is

5 to 10
2.5 to 3
2 to 2.5
1.25 to 2

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Remains unaffected
Decreases linearly
Increases
Decreases

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Mass Transfer
Water entrained by circulating air in cooling towers is termed as

Vapor load
Drift
None of the listed here
Blow down

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