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Mass Transfer

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

Vacuum
Short tube
Long tube
Falling film

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Mass Transfer
In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated.

Extractive
Azeotropic
Molecular
Flash

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Mass Transfer
For a binary mixture with low relative volatility, continuous rectification to get pure products will require

Low reflux ratio
Less number of trays
High reflux ratio
Small cross-section column

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Mass Transfer
For contacting a highly soluble gas with a liquid

Both of the options given here
None of the listed here
Bubble the gas through liquid
Spray the liquid on gas stream

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Mass Transfer
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg)

8.25
6.89
10
8.89

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Mass Transfer
Small dia distillation column can be a

Sieve tray
Any of these
Packed column
Bubble cap

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