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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)

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

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Mass Transfer
Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are

10
1
9
8

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Mass Transfer
During constant rate period, the rate of drying decreases with the

Decrease in air temperature
Both A & B
Neither A nor B
Increase in air humidity

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Mass Transfer
Absorption accompanied with chemical reaction is exemplified by the absorption of

All of these
Benzol present in coke oven gas by wash oil
SO₂ in alkaline solution
Ammonia in water

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Mass Transfer
Plate efficiency in a distillation column is reduced due to the __________ of liquid.

Foaming
Entrainment
Weeping & dumping
All of these

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Mass Transfer
The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law.

Exponential
Cubic
Parabolic
Linear

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