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Mass Transfer

Mass Transfer
In a binary distillation column, if the feed contains 40 mole % vapour, the q line will have a slope of

-1.5
-0.6
0.6
1.5

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Mass Transfer
__________ is used as an 'entrainer' for the separation of acetic acid-water mixture by distillation.

Hexane
Benzol
Furfural
Butyl acetate

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Mass Transfer
In distillation, overhead product contains

Any number of components
Only one component
Two components
Only saturated liquid

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Mass Transfer
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will

Decrease
Increase
Depend on saturated boiling point; may increase or decrease
Remains same

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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)

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

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Mass Transfer
Wet bulb and dry bulb temperatures becomes identical at __________ percent saturation curve.

50
100
None of these
78

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