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Mass Transfer

Mass Transfer
The value of Lewis number (Le = Sc/Pr) for air-water vapour system is around

600
3.97
1
0.24

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Mass Transfer
Under conditions of flooding in packed tower, the gas pressure drop

Decreases rapidly
Increases rapidly
Is maximum
Remains constant

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Mass Transfer
The most economical range of absorption factor is

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

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Mass Transfer
The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law.

Exponential
Parabolic
Linear
Cubic

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Mass Transfer
With increase in temperature, the rate of leaching increases, because the

Viscosity of solvent decreases
Diffusivity of solute increases
Thermal conductivity of solute increases
None of these

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Mass Transfer
______ extractor uses centrifugal force for separating the two phases.

Podbielniak
Treybal
Schiebel
None of the listed here

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