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Mass Transfer

Mass Transfer
Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as

K ∝ D1.5
K ∝ √D
K ∝ D2
K ∝ D

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Mass Transfer
Leaching of coffee from coffee beans is done by

Lime water
Hot water
Dilute H₂SO₄ (hot)
Hexane

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Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

50
0.5
5
0.05

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Mass Transfer
A minimum boiling azeotrope is exemplified by

Toluene-benzene
None of these
Acetone-carbon disulphide
Water-isobutyl alcohol

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Mass Transfer
Mass transfer co-efficient is directly proportional to DAB according to the __________ theory.

Penetration
Surface-renewal
None of these
Film

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Mass Transfer
Inside the distillation columns, the

Vapors are not always at their dew points
All of these
Highest temperatures is near the feed plate
Driving force for the liquid flow is its weight

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