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Mass Transfer

Mass Transfer
Condensation of a vapour-gas mixture just begins, when (where, p = partial pressure of the vapour P = vapour pressure of the liquid )

P = P
P
P < P
P >>P

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Mass Transfer
A minimum boiling azeotrope is exemplified by

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

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Mass Transfer
An alkaline solution is used to reduce the concentration of carbon dioxide in a stream from 10% to 0.1% by absorption with irreversible chemical reaction. The overall number of transfer units based on gas phase is

0.001
4.605
100
9.21

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Mass Transfer
Inside the distillation columns, the

Vapors are not always at their dew points
All of these
Highest temperatures is near the feed plate
Driving force for the liquid flow is its weight

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Mass Transfer
Minimum possible diameter of a packed coloumn is decided mainly by the

Liquid density
Gas viscosity
Flooding
Liquid hold up

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Mass Transfer
Dry bulb temperature of unsaturated air is more than its __________ temperature.

Wet bulb
Neither A nor B
Dew point
Both A & B

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