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Mass Transfer

Mass Transfer
Dorr thickener is an equipment used for

Clarification
Classification
Sedimentation
Leaching

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

Solvent extraction
Distillation
Absorption
None of these

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

Increases
Decreases
Remains same
Decreases linearly

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Mass Transfer
Rose oil is extracted from rose leaves using __________ distillation.

Low pressure
Extractive
High pressure
Steam

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Mass Transfer
In a moderately sized packed absorption tower, channeling (which is most severe with stacked packings) can be minimised by taking the ratio of tower diameter to packing diameter

< 8 : 1
< 6:1
> 8:1
> 4 :1

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Mass Transfer
During drying of a solid, the critical moisture content increases with

Decreased drying rate
Increased drying rate
Increased thickness of the solid
Both B and C

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