Chemical Process
Widely used method for the conditioning of boiler feed water is the

Sequestration
Cold lime process
Hot-lime soda process
Coagulation

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

Water with pH value less than 7, is acidic
The zeolite water softening process reduces the hardness of water by not more than 50%
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
The chamber process is

Preferred over contact process for producing 98 to 100% H₂SO₄ and various oleums
A batch process for directly producing high strength (98 to 100%) H₂SO₄
Non-catalytic and operates only on pyrites
None of these

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