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Mass Transfer

Mass Transfer
CO₂ can be absorbed by

Hot cupric oxide
Alumina
Cold Ca(OH)₂
Heated charcoal

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Mass Transfer
The unit of volumetric diffusivity is

Cm²/sec
Cm/sec
Cm³/sec
Cm²/seC₂

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Mass Transfer
Minimum reflux ratio in a distillation column results in

Minimum reboiler size
Maximum condenser size
Optimum number of trays
Minimum number of trays

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Mass Transfer
__________ extractor is used for the concentration of radioactive nuclear waste.

Seive plate
Mixer-settler
None of the listed here
Pulsed column

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Mass Transfer
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

< 8 : 1
> 8:1
> 4 :1
< 6:1

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Mass Transfer
During sensible cooling process

Relative humidity decreases
Wet bulb temperature decreases
Relative humidity increases
Both B and C

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