Mass Transfer
Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the

Multicomponent distillation is involved
Mixture (to be separated) shows positive deviation from ideality
Mixture (to be separated) shows negative deviation from ideality
Relative volatility is reasonably constant

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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 any point inside
Binary mixture is represented by the apex

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