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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Sedimentation
Classification
Leaching
Clarification

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Mass Transfer
Which of the following is not a batch drier?

Agitated pan drier
Fluidised bed drier
Truck drier
Vacuum shelf drier

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Mass Transfer
Molecular diffusivity of a liquid

May increase or decrease with temperature
Increases with temperature
Decreases with temperature
Is independent of temperature

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Mass Transfer
During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the

Liquid film
None of these
Liquid-gas interface
Gas film

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Mass Transfer
Solvent used in extractive distillation

Forms a low boiling azeotrope
Does not alter the relative volatility of the original components
Is of low volatility
Forms a high boiling azeotrope

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Mass Transfer
Rate of leaching increases with increasing

Pressure
Temperature
Size of the solid
Viscosity of solvent

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