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Mass Transfer

Mass Transfer
__________ equation applies to diffusivities in liquids.

Wilke and Chang
None of these
Hirschfelder
Gilliland

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Mass Transfer
At __________ reflux, theoretical number of plates in a distillation coloumn is calculated using Fenske-Underwood equation.

Maximum permissible
Total
Operating
Minimum

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Mass Transfer
__________ temperature is the steady state temperature attained by a small amount of liquid evaporating into a large quantity of unsaturated gas-vapor mixture.

Dry bulb
Dew point
Wet bulb
None of these

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Mass Transfer
The relative volatility of a binary mixture at the azeotropic composition is

1
∞
> 1

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Mass Transfer
Stage efficiency in a leaching process depends on the

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

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Mass Transfer
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower)

FG/(G.a)
L/(FG.G)
F/(FG.a)
(G.a)/FG

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