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Mass Transfer

Mass Transfer
At what percentage (by volume) of alcohol composition, it forms an azeotrope with water?

99
95
91.5
90

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Mass Transfer
In case of unsaturated air

Wet bulb temperature < dry bulb temperature
None of the listed here
Both of the options given here
Dew point < wet bulb temperature

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Mass Transfer
A minimum boiling azeotrope is exemplified by

None of these
Acetone-carbon disulphide
Water-isobutyl alcohol
Toluene-benzene

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

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Mass Transfer
Which of the following operations does not involve leaching?

Dissolving sugar from the cells of the beet
Dissolving gold from ores
Dissolving pharmaceutical products from bark or roots
Removing nicotine from its water solution by kerosene

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Mass Transfer
If moisture content of solid on dry basis is X, then the same on wet basis is

X/(X - 1)
(X - 1)/X
(X + 1)/X
X/(X + 1)

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MORE MCQ ON Mass Transfer

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