Mass Transfer
Radioactive nuclear waste is treated in

Mixer-settler extractor
Bollman extractor
Rotating-disc contactor
Pulsed column extractor

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Mass Transfer
If a two phase system is in physical equilibrium; then it means that, the

Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase
All of these
Total pressure throughout the liquid phase is equal to that throughout the vapor phase
Temperature of the liquid phase is equal to that of the vapor phase

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Mass Transfer
Pick out the wrong statement. Raoult's law does not apply, when the

Attractive forces between like and unlike molecules in the solution are approximately equal
Size of component molecules are not equal
Chemical combination or molecular association between unlike molecules takes place in the formation of solution
Component molecules are nonpolar

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Mass Transfer
Steam distillation is used to

Increase the efficiency of separation
Increase the total pressure of distillation
Reduce the number of plates
Avoid thermal decomposition of a component

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