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Mass Transfer

Mass Transfer
When the feed to a distillation column is a saturated liquid, slope of the feed line is

Zero
Infinity
None of these
Unity

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Mass Transfer
Mechanism of moisture removal in case of freeze drying of food stuff is by

Sublimation
Dehydration
Adsorption
Evaporation

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Mass Transfer
Fenske-Underwood equation used for calculating the minimum number of theoretical plates in distillation column is valid for

Constant relative volatility
Constant molal overflow
All of these
Total reflux

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

Maximum permissible
Operating
Minimum
Total

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Mass Transfer
Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid )

P = P
P
P < P
P >>P

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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)

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

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