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Mass Transfer

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

K ∝ D
K ∝ D1.5
K ∝ √D
K ∝ D2

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Mass Transfer
If the overall efficiency and Murphree plate efficiency are equal, then both the equilibrium and operating lines are

Straight
Both A & B
Neither A nor B
Parallel

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Mass Transfer
With increase in absolute humidity, the dew point of an unsaturated mixture of air and water vapor (at constant pressure and temperature)

Remains unchanged
Increases
Decreases linearly
Decreases

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Mass Transfer
The ratio of Murphree plate efficiency to point efficiency is always > 1 in a __________ flow model.

Both plug & perfectly mixed
None of the listed here
Plug
Perfectly mixed

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Mass Transfer
The equipment used in the extraction of highly corrosive radio active liquids is

Pulse column
Mixer settler
Baffle tower
Spray column

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Mass Transfer
Mechanism of moisture removal in case of freeze drying of food stuff is by

Evaporation
Dehydration
Sublimation
Adsorption

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