Ontario Operator-in-Training (OIT) Practice Exam

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What is the result of oxidation in water treatment?

Increase in organic matter
Transformation to more stable substances
Decrease in water pH
Production of toxic byproducts

The correct answer is: Transformation to more stable substances

The result of oxidation in water treatment primarily involves the transformation of substances into more stable forms. Oxidation plays a key role in the removal of contaminants by converting them into less harmful or more manageable substances through chemical reactions. For instance, when organic compounds are oxidized, they can break down into simpler molecules, which can then be more easily removed from the water or further processed by other treatment methods. This transformation to more stable substances is essential for enhancing water quality, as it minimizes the presence of harmful contaminants and ensures that the water meets safety standards for consumption and environmental discharge. The effectiveness of this process is critical in producing clean and safe drinking water while also protecting aquatic ecosystems.