Chemical Process
Hard water

All of these
Is not unfit for drinking purpose
Does not affect the lather formation by soap
Pollutes the water stream

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Chemical Process
The chamber process is

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

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