Mass Transfer
On addition of solute in the solvent, the __________ of the solution decreases.

Freezing point
Vapour pressure
Boiling point
Both B and C

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Mass Transfer
In saturated gas, the

None of the listed here
Vapour is in equilibrium with the liquid at the gas temperature
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

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Mass Transfer
To get high tray efficiency

Gas velocity should be very low
Time of contact between the two phases should be less
Interfacial surface between liquid and gas phase should be large
Liquid entrainment should be severe

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