Mass Transfer
The relative saturation of an unsaturated mixture of gas and vapor is independent of the

Composition of the mixture
None of these
Nature of the vapor
Temperature of the mixture

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

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

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