Mass Transfer
The expression, y(1 - x)/x(1 - y) is for

Relative volatility
Murphree efficiency
Selectivity
Absorption factor

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

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Mass Transfer
The term "cooling range" in a cooling tower refers to the difference in the temperature of

None of the listed here
Cold water leaving the tower and the wet bulb temperature of the surrounding air
Hot water entering the tower and the wet bulb temperature of the surrounding air
Hot water entering the tower and the cooled water leaving the tower

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