Mass Transfer
When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of

Partial pressure of component A to the total pressure
Vapour pressure of component A to that of component B
Vapour pressure of component A to the partial pressure of A
Vapour pressure of component A to the total pressure

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Mass Transfer
Inside the distillation column, the

Liquids are not always at their bubble points
Pressure increases gradually from bottom to the top of the column
Driving force for the vapour flow is the pressure drop
None of these

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Mass Transfer
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,

All of these
The distribution curve which is a plot between x (acetone concentration in one phase) and y (acetone concentration in other phase) is analogous to x-y curve used in distillation and absorption termina
As the acetone concentration increases, the solubility curves approach each other
Both the phases become identical at a particular common point on both the solubility curves called the plait point

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Mass Transfer
Heat load in a cooling tower

Means the amount of heat thrown away (KCal/hr.) by the cooling tower
Neither A nor B
Is equal to the number of kg, of water circulated times the cooling range
Both A & B

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