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Mass Transfer

Mass Transfer
Penetration model (theory) for mass transfer was enunciated by

Kissinevskii
Higbie
Danckwerts
Toor and Marchello

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Mass Transfer
Fenske equation determines the

Optimum reflux ratio
Maximum number of ideal plates
Height of the distillation column
Minimum number of theoretical plates

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

Calculated
Not required
Unknown
Known

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Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Packed
Bubble
Tray
Spray

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

√T
T²
T
T³

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Mass Transfer
Mechanism of moisture removal in case of freeze drying of food stuff is by

Sublimation
Evaporation
Adsorption
Dehydration

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