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Mass Transfer

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

Higbie
Toor and Marchello
Kissinevskii
Danckwerts

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Mass Transfer
Humidity chart is useful for the solution of problems concerning condensation, vaporisation and air conditioning. At a given dry bulb temperature, value of humidity obtained from the humidity chart directly, is in terms of __________ humidity.

Percentage
Relative
Molal
None of these

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Mass Transfer
The main reason for dividing a tall packed tower into series of small towers is to

Minimise the overall pressure drop
Avoid flooding
Avoid channeling
Reduce liquid hold up

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Mass Transfer
Cox chart is useful in the design of

Evaporator
Crystalliser
Dryer
Distillation column

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Mass Transfer
Molecular seives are porous

None of these
Alumina
Silica
Synthetic zeolites crystals/metal alumino-silicates

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Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Total
Maximum permissible
Minimum
Operating

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