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Mass Transfer

Mass Transfer
Deairation (removal of O₂) of water is done by

Ion-exchange
Absorption
Adsorption
Rectification

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Mass Transfer
Mass transfer co-efficient is defined as

Flux = Co-efficient/concentration difference
None of the listed here
Co-efficient = Flux/concentration difference
Flux=concentration difference/co-effi-cient

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Mass Transfer
Which of the following parameters remains almost constant during adiabatic saturation of unsaturated air?

Dry bulb temperature
Wet bulb temperature
Dew point
None of these

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Mass Transfer
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature)

Log P vs. log T
T vs . P
Log P vs . T
P vs . log T

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

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Mass Transfer
Which of the following is the most commonly used leaching solvent in vegetable oil industry?

Hexane
Liquid SO₂
Furfurol
Phenol

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