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Mass Transfer

Mass Transfer
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)

L/mG
LG/m
ML/G
G/mL

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Mass Transfer
Reboiler is considered as one theoretical plate, because

None of these
Of the assumption that vapour and liquid leaving the reboiler are in equilibrium
Vapour is recycled to the column
Reboiler itself contains one plate

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Mass Transfer
The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is

None of these
Spray chamber
Natural draft cooling tower
Induced draft cooling tower

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Mass Transfer
Degree of freedom for leaching and solvent extraction process is

1
2
3

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Mass Transfer
Large scale usage of flash distillation is practised in

Soap manufacturing
Polymerisation industry
Ammonia synthesis plant
Petroleum refinning

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Mass Transfer
Back-trapping in a distillation column

Reduces pressure drop
Increases tray efficiency
Decreases tray efficiency
Is desirable, as it provides improved vapour-liquid contact

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