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Mass Transfer

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

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

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Mass Transfer
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

Log P vs. log T
T vs . P
Log P vs . T
P vs . log T

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Mass Transfer
Flash distillation is suitable for the separation of components

Having very close boiling points
Which form minimum boiling azeotrope
Which form maximum boiling azeotrope
Having very wide boiling points

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Mass Transfer
Ordinary diffusion process is also called __________ diffusion.

Forced
Thermal
Pressure
Concentration

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Mass Transfer
The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called

Percolation
Decoction
None of these
Elutriation or elution

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Mass Transfer
For gas absorption, low viscosity solvents are preferred, because of their

Rapid absorption rates
All of these
Low pumping pressure drop
Better flow characteristics

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