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Mass Transfer

Mass Transfer
Rayleigh's equation applies to __________ distillation.

Differential
Steam
Continuous
Flash

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Mass Transfer
For which of the following unit operations, Lewis number is of significance?

Gas absorption
Humidification
Binary distillation
Adsorption

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Mass Transfer
Steam distillation is used to separate

High boiling substances from nonvolatile impurities
Azeotropes
Mixtures of low relative volatility
Heat sensitive materials

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Mass Transfer
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.

70-80
44119
90-100
30-40

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Mass Transfer
A binary mixture of benzene and cyclohexane is separated by

Flash vaporisation
Ordinary distillation
Extractive distillation
Solvent extraction

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

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

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