Mass Transfer
In a distillation operation, what is the effect of the temperature of the reflux stream (given below) on the condenser and reboiler loads? Reflux conditions:(i) Reflux stream is completely liquid and is at its bubble point.(ii) Reflux stream is below its bubble point.

Reboiler load is the same in both the cases but condenser load is higher in case (ii)
Both condensor and reboiler loads are higher in case (ii) as compared to case (i)
Condenser and reboiler loads are the same in both the cases
Condenser load is the same in both the cases but reboiler load is higher in case (ii)

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Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Size of component molecules are not equal
Attractive forces between like and unlike molecules in the solution are approximately equal
Component molecules are nonpolar
Chemical combination or molecular association between unlike molecules takes place in the formation of solution

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

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