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Mass Transfer

Mass Transfer
The suitable evaporator for concentration of foaming liquids is a __________ evaporator.

Vacuum
Falling film
Short tube
Long tube

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Mass Transfer
Which of the following is the most commonly used leaching solvent in vegetable oil industry?

Furfurol
Liquid SO₂
Phenol
Hexane

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

Toor and Marchello
Kissinevskii
Danckwerts
Higbie

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Mass Transfer
The fixed cost of a distillation column at minimum reflux ratio is

Infinite
Optimum
Minimum
None of these

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Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 - Ro) = Ro/Ri
(1 - Ri) = Ro/Ri
(1 + Ro) = Ro/Ri
(1 + Ri) = Ro/Ri

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Remains unchanged
Decreases
Increases
Depends on the pressure of the system

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