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Mass Transfer

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

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

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Mass Transfer
If the specific heats of a gas and a vapor are 0.2KJ/Kg.°K and 1.5 KJ/Kg.°K respectively, and the humidity is 0.01; the humid heat in KJ/°Kg. is

0.107
0.31
0.215
0.017

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Mass Transfer
During constant rate period, the rate of drying decreases with the

Decrease in air temperature
Increase in air humidity
Neither A nor B
Both A & B

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Mass Transfer
Chemisorption (chemical adsorption) is

Characterised by adsorption of heat
Same as "Van der Waals" adsorption
A reversible phenomenon
An irreversible phenomenon

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Mass Transfer
Packed column distillation is limited to the column __________ metres.

Diameter < 0.6
Both A & B
Neither A nor B
Height < 6

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Mass Transfer
Azeotropism for ethyl alcohol-water system disappears by

No means
Decreasing pressure
Increasing temperature
Increasing pressure

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