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Mass Transfer

Mass Transfer
Leaching of coffee from coffee beans is done by

Hexane
Dilute H₂SO₄ (hot)
Lime water
Hot water

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Mass Transfer
Mass transfer co-efficient varies as DAB0.5, according to the __________ theory.

Film
Penetration
None of these
Surface renewal

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Mass Transfer
In stripping section of continuous distillation column, the

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

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

K ∝ √D
K ∝ D2
K ∝ D
K ∝ D1.5

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Mass Transfer
__________ equation applies to diffusivities in liquids.

Hirschfelder
Gilliland
None of these
Wilke and Chang

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Mass Transfer
Make up water is supplied during cooling tower operation to compensate for water losses due to

Evaporation
All of these
Blowdown
Entrainment

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