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MASS TRANSFER

Mass Transfer
Radioactive nuclear waste is treated in

Pulsed column extractor
Rotating-disc contactor
Bollman extractor
Mixer-settler extractor

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Mass Transfer
Unit operation involved in the prilling of urea is

Both B and C
Drying
Evaporation
Crystallisation

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Mass Transfer
Danckwerts developed the __________ theory.

Film
Surface renewal
None of these
Penetration

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Mass Transfer
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is

< 1
1
> 1

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Mass Transfer
With increase in pressure, the relative volatility for a binary system

Remains same
Decreases
Either A or B, depends on the system
Increases

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