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

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Mass Transfer
For a ternery mixture, in which equilateral triangular co-ordinate is used in leaching and extraction, a __________ of the equilateral triangular co-ordinates.

Ternery mixture is represented by the sides
Pure component is represented by the apex
Binary mixture is represented by the apex
Binary mixture is represented by any point inside

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