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MASS TRANSFER

Mass Transfer
The vapour pressure exerted by the moisture contained in a wet solid depends upon the

Nature of the solid
All of these
Temperature
Nature of the moisture

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Mass Transfer
With increase in gas rate, the number of transfer units, NtoG, for a fixed degree of absorption by a fixed amount of solvent

Decreases
Remains unaffected
Increases
Decreases linearly

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Mass Transfer
During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the

Liquid-gas interface
None of these
Gas film
Liquid film

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Mass Transfer
1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is

0.2
0.175
0.4
0.25

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Mass Transfer
Decoction refers to the use of solvent

At its boiling point
In its vapor form
None of these
At ambient temperature

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