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
Zeolite is a/an

Naturally occuring clay which is capable of exchanging cations
Abrasive material
Catalyst used in shift conversion
None of these

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