Massachusetts Wastewater Practice Exam

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Which of the following is a common compound used for oxidation?

Sodium hypochlorite.
Organic solvents.
Acid.
NaCl.

The correct answer is: Sodium hypochlorite.

Sodium hypochlorite is widely recognized as a common oxidizing agent used in various applications, particularly in wastewater treatment. It functions by releasing chlorine when dissolved in water, effectively promoting the oxidation of organic materials and pathogens. This characteristic makes it invaluable in disinfection processes, where the goal is to eliminate harmful microorganisms and improve water quality. The other substances listed, while they have their own uses, do not primarily serve as oxidation agents in the context of wastewater treatment. Organic solvents are primarily used for dissolving other substances rather than for oxidation. Acids, meanwhile, can contribute to chemical reactions but are more often involved in neutralization and not specifically oxidation. Sodium chloride (NaCl) functions more as a source of chloride ions rather than acting as an oxidizing agent in many treatment processes. Thus, sodium hypochlorite stands out as the most relevant choice in the context of oxidation in wastewater management.