Chemical Process
Mercury cells for caustic soda manufacture, compared to diaphragm cells

Require more power
Require lower initial investment
None of these
Produce lower concentration NaOH

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Chemical Process
Presence of sodium tripolyphosphate (an additive) in synthetic detergent

None of these
Does not allow redeposition of dirt on the cleaned surface
Inhibits its corrosive effects
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

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