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Mass Transfer

Mass Transfer
Leaching of coffee from coffee beans is done by

Hot water
Hexane
Lime water
Dilute H₂SO₄ (hot)

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Mass Transfer
Which of the following is the most suitable for extraction in a system having very low density difference?

Pulsed extractor
Centrifugal extractor
Mixer-settler extractor
Packed extraction tower

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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
Liquid is stripped of high boiler
None of these

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Mass Transfer
Molecular seives are regenerated by heating to __________ °C.

< 150
> 500
> 1000
200-330

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Mass Transfer
In case of gases, the binary diffusivity is proportional to (where, P = pressure)

1/P
P
√P
1/√P

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Mass Transfer
Which is the controlling factor for a drum drier?

Diffusion
Both A & B
Heat transfer
Neither A nor B

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