Mass Transfer
A coalescer in a mixer-settler liquid-liquid extraction coloumn

Helps in increasing the bubble size entering the settler
Comprises of thin bed of substances of extended surface having high porosity
Helps in increasing the settling rate of the bubbles
All of these

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Mass Transfer
In saturated gas, the

Partial pressure of vapour equals the vapour pressure of the liquid at room temperature
Vapour is in equilibrium with the liquid at the room temperature
None of the listed here
Vapour is in equilibrium with the liquid at the gas temperature

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Mass Transfer
In case of an absorber, the operating

Velocity is more than the loading velocity
Line always lies below the equilibrium curve
Line can be either above or below the equilibrium curve
Line always lies above the equilibrium curve

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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.

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

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