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

Vapour pressure
Boiling point
Freezing point
Both B and C

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Mass Transfer
Priming in a distillation column

Is characterised by the presence of foam throughout the space between trays
Reduces the overall pressure drop
Is desirable from point efficiency consideration
Results from very low gas velocity

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Mass Transfer
Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 x 10⁻³ kg mole/m².s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m² .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is

5.6 x 10⁻³
8.5 x 10⁻³
5.6 x 10⁻⁴
8.5 x 10⁻⁴

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