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Mass Transfer

Mass Transfer
Selectivity of the solvent used in solvent extraction should be

> 1
1
< 1

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Mass Transfer
Which of the following plays an important role in problems of simultaneous heat and mass transfer?

Schmidt number
Lewis number
Prandtl number
Sherwood number

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Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 - Ro) = Ro/Ri
(1 + Ro) = Ro/Ri
(1 + Ri) = Ro/Ri
(1 - Ri) = Ro/Ri

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Mass Transfer
In case of liquid-liquid binary diffusion, diffusivity of one constituent into another is not dependent on the

Concentration
Temperature and pressure
None of these
Nature of the constituents

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Mass Transfer
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )

T²
T³
T
√T

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Mass Transfer
Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.

Unbound
Critical
Free
Bound

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