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

Freezing point
Both B and C
Vapour pressure
Boiling point

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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
Use of raschig rings in place of crushed stones as packing in packed beds (other things being same)

Increases pressure drop, increases surface area
Decreases pressure drop, increases surface area
Decreases pressure drop, decreases surface area
Increases pressure drop, decreases surface area

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