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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

95
91.5
90
99

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Mass Transfer
Bound moisture is that liquid which exerts an equilibrium vapor pressure __________ that of the pure liquid at the given temperature.

Equal to
Either A or B; depends on the solid
Less than
More than

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Mass Transfer
Stage efficiency in a leaching process depends on the

Rate of diffusion of the solute through the solid and into the liquid
Both A & B
Time of contact between the solid and the solution
Vapour pressure of the solution

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Mass Transfer
For turbulent mass transfer in pipes, the Sherwood number depends on the Reynolds number as

Re
Re0.53
Re0.33
Re0.83

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Mass Transfer
The commonly used solvent in supercritical extraction is

Methyl ethyl ketone
Carbon dioxide
Carbon tetrachloride
Water

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Mass Transfer
For the case of flow of air past a wet bulb thermometer (air water vapour system), the approximate value of Hâ‚‚/ky.Cz is around

0.72
0.24
0.6
1

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