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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
Re0.33
Re

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Mass Transfer
If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.

None of these
> 100
< 100
100

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Mass Transfer
Which of the following operations does not involve leaching?

Dissolving sugar from the cells of the beet
Dissolving gold from ores
Dissolving pharmaceutical products from bark or roots
Removing nicotine from its water solution by kerosene

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Mass Transfer
Antibiotics are best handled in a

Rotating disc contactor
Sieve tray contractor
Podbielniak extractor
Pulsed column extractor

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Mass Transfer
Azeotropic distillation is employed to separate

Constant boiling mixture
Mixture with very high relative volatility
High boiling mixture
Heat sensitive materials

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Mass Transfer
In distillation columns, the number of bubble caps per tray primarily depends upon the

Allowable liquid velocity
Feed composition
Allowable gas and liquid velocities
Allowable gas velocity

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