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Mass Transfer

Mass Transfer
Weight of 1 m³ of humid air as compared to 1 m³ of dry air, under the same conditions, is

Unpredictable
Less
More
Same

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Mass Transfer
The most economical range of absorption factor is

2.5 to 3
2 to 2.5
1.25 to 2
5 to 10

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Mass Transfer
With increase in temperature, the rate of extraction in leaching (solid-liquid extraction system)

Increases Linearly
Increases
Remains unaffected
Decreases

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Mass Transfer
Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture.

Critical
Bound
Free
Unbound

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Mass Transfer
Most important factor to be considered in the selection of packings for absorbers is the __________ of packing.

Size
Durability
Cost
Porosity

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Mass Transfer
According to the film theory of mass transfer, the mass transfer co-efficient is proportional to (where, D = molecular diffusivity)

D2
D0.5
D
1/D

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