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Mass Transfer

Mass Transfer
The diffusivity (D) in a binary gas mixture is related to the pressure (P) as

D ∝ 1/P0.5
D ∝ 1/P1.5
D ∝ 1/P
D ∝ P0.5

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Mass Transfer
To remove all the moisture from a wet solid it requires exposure to __________ air.

High temperature
Highly humid
Perfectly dry
None of these

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Mass Transfer
Removal of __________ exemplifies an adsorption unit operation.

Ammonia from coke oven gas
Water from petrol
None of the listed here
Uranium from its ore

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Mass Transfer
The solvent used in liquid-liquid extraction should have __________ less than one.

Selectivity
Neither A nor B
Distribution co-efficient
Both A & B

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Mass Transfer
Extraction of coffee from its seed is done by

Liquid-liquid extraction
Extractive distillation
Steam distillation
Leaching

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Mass Transfer
Corresponding to Prandtl number in heat transfer, the dimensionless group in mass transfer is the __________ number.

Schmidt
Peclet
Sherwood
Stanton

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