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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
LG/m
L/mG
ML/G

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Mass Transfer
(NSh/NRe.NSc) is termed in mass transfer operation as the

Thermal diffusivity
Stanton number
Peclet number
Momentum diffusivity

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Mass Transfer
For __________ drying, the effects of velocity, temperature and humidity of the gas and the thickness of the solid are the same.

Unsaturated surface
Both A & B
Neither A nor B
Constant rate

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Mass Transfer
Solvent used in extractive distillation

Does not alter the relative volatility of the original components
Forms a low boiling azeotrope
Forms a high boiling azeotrope
Is of low volatility

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Mass Transfer
The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________

4
1
3
2

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Mass Transfer
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in

Increased reboiler load
None of these
Increased reflux ratio
Greater degree of separation with a fixed number of trays

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