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Mass Transfer

Mass Transfer
If f = moles of vapour present per mole of feed, then the slope of feed line is

- 1/f
(1 - f)/f
- f/(1 - f)
- (f - 1)/f

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Mass Transfer
Steam distillation is used to separate

High boiling substances from nonvolatile impurities
Heat sensitive materials
Azeotropes
Mixtures of low relative volatility

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Mass Transfer
Weight of 1 m³ of humid air as compared to 1 m³ of dry air, under the same conditions, is

More
Less
Same
Unpredictable

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

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Mass Transfer
Sand is dried in foundaries in a___drier.

Spray
Rotary
Vacuum
Fluidisedbed

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Mass Transfer
Leaching rate is independent of the

Agitation
None of the listed here
Temperature
Particle size

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MORE MCQ ON Mass Transfer

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