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Mass Transfer

Mass Transfer
Rayleigh's equation applies to __________ distillation.

Flash
Differential
Steam
Continuous

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Mass Transfer
Very tall packed towers are divided into series of beds to

Reduce the overall pressure drop
Avoid flooding
Avoid channelling
Reduce liquid hold-up

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Mass Transfer
Minimum possible diameter of a packed coloumn is decided mainly by the

Flooding
Liquid density
Gas viscosity
Liquid hold up

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Mass Transfer
Humidification involves mass transfer between a pure liquid phase and a fixed gas, which is

At a fixed temperature
Non-ideal in nature
Insoluble in the liquid
Soluble in the liquid

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Mass Transfer
Back-trapping in a distillation column

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

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Mass Transfer
For experimental determination of mass transfer co-efficient by wetted wall tower, the mass transfer area is

Unknown
Known
Calculated
Not required

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