Chemical Process
Economics of 'Solvay Process' depends upon the efficiency of

Ammoniation of salt solution
Ammonia recovery
Carbonating tower
Ammonia recovery and size of the plant

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Chemical Process
Reverse osmosis is normally used for the

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

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Chemical Process
Pick out the false statement pertaining to water treatment.

Water with pH value less than 7, is acidic
Sodium sulphate or sodium carbonate do not cause hardness in water
The zeolite water softening process reduces the hardness of water by not more than 50%
Aeration of water is effective in CO₂ removal

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