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Mass Transfer

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

Re0.83
Re0.53
Re
Re0.33

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Mass Transfer
A good solvent used for absorption should not have very high

All of these
Freezing point
Vapor pressure
Viscosity

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Decreases linearly
Remains unaffected
Decreases
Increases

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Mass Transfer
In batch distillation with constant reflux, overhead product composition __________ with time.

Does not vary
May increase on decrease, depends on the system
Decreases
Increases

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Mass Transfer
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.

Critical
Free
Bound
Unbound

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Mass Transfer
For achieving rapid drying rate in a spray dryer, the diameter of the particles in the feed should be in the range of __________ microns (1 mm = 1000 microns).

> 500
200-300
22190
43835

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