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Mass Transfer

Mass Transfer
Pore size of the molecular seive 5A is __________ mm.

50
5
0.05
0.5

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Mass Transfer
The Kundsen diffusivity is proportional to (where, T = absolute temperature)

√T
T⁴
T²
T

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Mass Transfer
The most common packing used in industrial operations is __________ rings.

Single spiral
Lessing
Cross-partition
Raschig

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Mass Transfer
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

3
2
4
1

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Mass Transfer
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes

None of these
1
?

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

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

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