Mass Transfer
As the reflux ratio increases, the slope of the operating line for rectifying section

Remains constant
Data insufficient, cannot be predicted
Increases
Decreases

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Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

All of these
Temperature of the liquid phase is equal to that of the vapor phase
Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase
Total pressure throughout the liquid phase is equal to that throughout the vapor phase

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