Chemical Process
Reverse osmosis is normally used for the

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

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Chemical Process
Shaving soaps are

Metalic soaps compounded with frothing agents
High free alkali soaps having excess of cane sugar and alcohol
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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