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
Aeration of water is effective in CO₂ removal
The zeolite water softening process reduces the hardness of water by not more than 50%

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

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

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