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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
Re0.33
Re
Re0.53

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Mass Transfer
In which of the following unit operations, the selectivity is an important parameter?

Distillation
Absorption
Solvent extraction
None of these

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Mass Transfer
__________ columns are used for liquid dispersion in a continuous gas phase.

Bubble cap
Sieve plate
Packed
Pulse

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Mass Transfer
The individual mass transfer co-efficients (moles/m² . s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling ?

Liquid side
Both liquid and gas side
Gas side
Interfacial

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Mass Transfer
Drift in a cooling tower is

The water entrained by the circulating air
All of these
Dependent on the water lost by evaporation
Desirable

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Mass Transfer
Decoction refers to the use of solvent

In its vapor form
At ambient temperature
None of these
At its boiling point

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