Which element is commonly used to disinfect water in swimming pools?

• A. Iron
• B. Sodium
• C. Carbon
• D. Chlorine

Answer: (D)

Verified step by step guidance

1. Identify the purpose of the element in the context of the problem, which is to disinfect water in swimming pools.
2. Recall common disinfectants used in water treatment, focusing on elements or compounds known for their antimicrobial properties.
3. Evaluate the options given: Iron, Sodium, and Carbon, considering their chemical properties and typical uses in water treatment.
4. Recognize that Chlorine, although not listed among the options, is widely known and commonly used as a disinfectant in swimming pools due to its ability to kill bacteria and other pathogens.
5. Conclude that Chlorine is the correct element used for disinfecting swimming pool water, as it effectively maintains water hygiene and safety.