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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)

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

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Mass Transfer
A solid material shows case hardening properties while drying. Which of the following should be controlled to control the drying process?

Temperature of the solid
Humidity of inlet air
Relative humidity of outlet air
Flow rate of inlet air

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Mass Transfer
Perforated plate towers are unique for solvent extraction because, they provide

None of these
Better contact of the phase
Higher contact area
Repeated coalescence & redispersion of the drop phase

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Mass Transfer
Absorption factor, for a fixed degree of absorption from a fixed amount of gas should be

≤ 1
> 1
1
< 1

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Mass Transfer
In case of absorption, both the operating and equilibrium lines will be straight for

Isothermal operation
None of these
Dilute solutions
Dilute solutions and isothermal operation

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Mass Transfer
When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity.

Pressure rises
Pressure falls
Temperature falls
Temperature rises

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