Mass Transfer
If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution temperature (CST or consolute temperature). If solubilities increase with decrease in temperature, then CST is the temperature below which they dissolve completely. If a binary system has no critical solution temperature, it implies that

The system comprises of partially mis-cible liquids
On heating, a vapor phase will appear ; while on cooling, a solid phase will appear
The system comprises of miscible liquids
The system comprises of an azeotrope

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Mass Transfer
Pick out the wrong statement pertaining to leaching.

Door classifier can be used for leaching of coarse solids
Fine solids can not be leached in a Pachuka tank
Very high temperature is not needed for the leaching of sugar beet
Vegetable seeds can be leached in either of Bollman extractor, Rotocel or Kennedy extractor

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Mass Transfer
In steam distillation, the

Product must be immiscible with water
Temperature is higher than the boiling point of either component
Temperature is more than 100° C
Temperature is 100°C

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