Mass Transfer
For a distillation column operating at minimum reflux, the

Reflux ratio will be maximum
Concentration of liquid and vapour leaving a plate will be same
Number of plates required will be maximum
None of these

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

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