Nursing Entrance Exam Practice Test 2025 – Complete Prep Resource

Treating contaminated water with chlorine is a widely recognized method for disinfecting and purifying water by effectively killing harmful bacteria and other pathogens. Chlorine is a powerful oxidizing agent that works by penetrating the cell walls of microorganisms and disrupting their metabolic processes, ultimately leading to cell death. This method is advantageous due to its ability to eliminate a wide range of bacteria within a relatively short time frame, making it suitable for large-scale water treatment facilities and emergency disinfection scenarios.

The other methods, while useful in various contexts, do not primarily address the need to kill bacteria. For instance, filtering primarily removes larger particles and some impurities but may not effectively eliminate smaller bacteria. Passing water through charcoal can adsorb certain contaminants and improve taste and odor but does not guarantee bacterial removal. Allowing water to settle can help separate solids from liquids, but this process does not actively kill bacteria. Thus, treating water with chlorine stands out as the most effective process for purifying contaminated water from bacteria.