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Softening chemicals, lime and soda do not depend on ____________

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in Environmental Engineering by (81.4k points)
Softening chemicals, lime and soda do not depend on ____________

(a) Free carbon dioxide present

(b) Non carbonate hardness

(c) Total magnesium

(d) Carbonate hardness

The question was asked in an interview.

Origin of the question is Lime Soda Process in section Water Softening of Environmental Engineering

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Best answer
The correct choice is (d) Carbonate hardness

For explanation: Lime and soda depend on free carbon dioxide present, non carbonate hardness, total magnesium and does not depend on carbonate hardness.

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