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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm/sec
Cm²/seC₂
Cm²/sec
Cm³/sec

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Mass Transfer
In a distillation column, with increase in the reflux ratio, the heat removed in the cooler

And the heat required in reboiler decreases
Increases
Remains unaffected
Decreases

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Mass Transfer
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is

100
4.605
9.21
0.001

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Mass Transfer
For a binary mixture with low relative volatility,

Use steam distillation
Use high pressure distillation
An azeotrope may be formed during distillation
Use molecular distillation

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Mass Transfer
Ammonia present in the coke oven gas is removed by washing with

Ethanolamine
Dilute HCl
Caustic solution
Dilute ammoniacal liquor

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Mass Transfer
______ extractor uses centrifugal force for separating the two phases.

Schiebel
Treybal
None of the listed here
Podbielniak

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