Chemical Process
Reverse osmosis is normally used for the

Separation of isotopes of uranium from gaseous uranium hexaflouride
Separation of helium from natural gas
Purification of oxygen
Desalination of brackish water to produce potable (drinking) water

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Chemical Process
Shaving soaps are

High free alkali soaps having excess of cane sugar and alcohol
Metalic soaps compounded with frothing agents
Soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property
None of these

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