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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Leaching
Sedimentation
Clarification
Classification

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Mass Transfer
As the reflux ratio, in a continuous counter-current extraction is increased, the number of stages

Increase
Can either increase or decrease, depends on the system
Remain unchanged
Decrease

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Mass Transfer
The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.

Heat and mass
Mass and momentum
Heat, momentum and mass
Heat and momentum

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Mass Transfer
Molecular seives are porous

Silica
None of these
Synthetic zeolites crystals/metal alumino-silicates
Alumina

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Mass Transfer
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

Tray
Packed
Bubble
Spray

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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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