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

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

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Mass Transfer
In saturated gas, the

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

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