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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

0.24
3.97
1
600

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Mass Transfer
In stripping section of continuous distillation column, the

Liquid is stripped of high boiler
None of these
Liquid is enriched with high boiler
Vapour is stripped of low boiler

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Mass Transfer
Large scale usage of flash distillation is practised in

Petroleum refinning
Soap manufacturing
Polymerisation industry
Ammonia synthesis plant

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Mass Transfer
Which of the following is an undesirable property in a tower packing?

Large weight of liquid retained
Low weight per unit volume
Large surface per unit volume
Large free cross-section

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Mass Transfer
__________ is used as an 'entrainer' for the separation of acetic acid-water mixture by distillation.

Hexane
Benzol
Butyl acetate
Furfural

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Mass Transfer
Which of the following assumes constant molal vaporisation and overflow?

Enthalpy concentration method
Plate absorption column
McCabe-Thiele method
Ponchan-Savarit method

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