Mass Transfer
Entrainer used in azeotropic distillation should

Form a new azeotrope of low relative volatility with one of the constituents of the mixture
Have high viscosity to provide high tray efficiency
Form a low boiling azeotrope with one of the constituents of the mixture
Have high latent heat of vaporisation

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Mass Transfer
One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect

The product composition but not the fraction vaporised
The product composition as well as the fraction vaporised
Neither the product composition nor the fraction vaporised
The fraction vaporised but not the product composition

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