Mass Transfer
Leaching of uranium ore and gold ore is done in

Centrifugal extractor
Pachuka tanks
Bollman extractor
None of these

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Mass Transfer
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when

One of the liquid components has very high affinity towards the solvent
Viscosity of liquid components is very high
Extracting solvent is cheaply & abundantly available
One of the liquid components is heat sensitive

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

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