Removal of dirt/soil by soaps or detergent does not involve the _______________ of soil ?
Correct answer: C. Precipitation
- A. Emulsification
- B. Dispersion
- C. Precipitation
- D. Wetting
Explanation
Soap or detergent cleaning depends on wetting the soil, dispersing particles and emulsifying oily matter. Precipitation is not a cleaning mechanism and may instead produce insoluble soap scum in hard water.
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