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Mass Transfer

Mass Transfer
Humid volume, at a given temperature is a/an __________ function of humidity.

Inverse
Logarithmic
Linear
Exponential

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Mass Transfer
A pure drug is administered as a sphere and as a cube. The amount of drug is the same in the two tablets. Assuming that the shape and size do not influence the mass transfer, the ratio of rate of dissolution in water at t = 0 for the cubic to spherical tablet is

1.04
0.54
1.24
1.94

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Mass Transfer
Surface renewal model of mass transfer was enunciated by

Toor and Marchello
Fick
Danckwerts
Stefan

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Mass Transfer
Which of the following unit operations makes use of Thiele-Geddes equation?

Multicomponent absorption with chemical reaction
Solid-liquid extraction
Multicomponent distillation
Liquid-liquid extraction

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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
Degree of freedom for leaching and solvent extraction process is

3
1
2

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