Mass Transfer
Overall efficiency of the distillation column is

The ratio of number of ideal plates to actual plates
Always more than the point efficiency
The ratio of number of actual plates to ideal plates
Same as the Murphree efficiency

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP