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Mass Transfer

Mass Transfer
In liquid-liquid extraction, the number of phases at plait point is

4
1
3
2

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Mass Transfer
If Rm is the minimum reflux ratio, the optimum reflux ratio may be around __________ Rm.

2.5 to 3
3 to 4
1.2 to 1.5
5

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Mass Transfer
In extraction, as the temperature increases, the area of hetrogeneity (area covered by binodal curve)

Remains unchanged
None of these
Increases
Decreases

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Mass Transfer
The critical moisture content in case of drying indicates the __________ rate period.

End of falling
None of these
Beginning of constant
Beginning of falling

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

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

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Mass Transfer
Wetted wall tower experiment determines the

Molal diffusivity
Mass transfer co-efficient
None of these
Volumetric co-efficient

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