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Mass Transfer

Mass Transfer
Tea percolation employs

None of these
Liquid-liquid extraction
Absorption
Leaching

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

Furfural
Butyl acetate
Benzol
Hexane

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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)

10
8.25
6.89
8.89

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Mass Transfer
The Schmidt number which is defined as, μ/ρ D, is the ratio of the

Momentum diffusivity to the thermal diffusivity
Thermal diffusivity to the mass diffusivity
None of these
Momentum diffusivity to the mass dif-fusivity

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Mass Transfer
Molecular distillation is

High temperature distillation
Both B and C
Very low pressure distillation
For heat-sensitive materials

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Mass Transfer
Flash distillation is suitable for the separation of components

Having very close boiling points
Having very wide boiling points
Which form maximum boiling azeotrope
Which form minimum boiling azeotrope

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