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

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

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Chemical Process
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

Its calorific value is very less
Tar neutralises the residual acids present in pitch
All of these
It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop

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