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Mass Transfer

Mass Transfer
Desirable value of absorption factor in an absorber is

1
< 1
0.5
> 1

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Mass Transfer
In a counter-current extractor, as the axial mixing increases, the extraction efficiency

Decreases
Increases
Depends on the pressure of the system
Remains unchanged

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Mass Transfer
High pressure at the bottom of a distillation tower handling heat sensitive materials results in

Increased relative volatility
Erosion of the tower
Thermal decomposition of bottoms
Very efficient operation

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Mass Transfer
Molecular distillation is

Very low pressure distillation
High temperature distillation
For heat-sensitive materials
Both B and C

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Mass Transfer
__________ column is used in gas absorption process.

Seive/perforated tray
Wetted wall
Packed
Bubble cap

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Mass Transfer
Dry bulb temperature of the gas is __________ the wet bulb temperature.

Equal to
Less than
More than
None of these

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