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Mass Transfer

Mass Transfer
The unit of volumetric diffusivity is

Cm³/sec
Cm²/seC₂
Cm²/sec
Cm/sec

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Mass Transfer
Stacked packing compared to dumped packing

Gives higher pressure drop
Provides poorer contact between the fluids
Gives lower pressure drop
Both A & B

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Mass Transfer
Surface renewal model of mass transfer was enunciated by

Danckwerts
Fick
Toor and Marchello
Stefan

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Mass Transfer
The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line)

ML/G
LG/m
L/mG
G/mL

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Mass Transfer
Stage efficiency in a leaching process depends on the

Rate of diffusion of the solute through the solid and into the liquid
Time of contact between the solid and the solution
Both A & B
Vapour pressure of the solution

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Mass Transfer
Pick out the system with maximum boiling azeotrope at 1 atm.

Benzene-ethyl alcohol
None of these
Acetone chloroform
Ethyl alcohol-water

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MORE MCQ ON Mass Transfer

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