Chemical Process
Reverse osmosis is normally used for the

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

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Chemical Process
Comparing sulphate process with sulphite process, we find that __________ in the later.

Both temperature & pressure in the former is less than that
Temperature is more in the former whereas pressure is more
Both temperature & pressure in the former is more than that
Pressure is more in the former whereas temperature is less

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