Question:
Which of the following is/are NOT active disinfectant(s) in water treatment?
Which of the following is/are NOT active disinfectant(s) in water treatment?
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In water treatment, active disinfectants such as hydroxyl radicals, ozone, and hypochlorite ions are used due to their strong oxidation capabilities. Chloride ions are not active disinfectants as they lack sufficient oxidative potential.
Updated On: Feb 3, 2026
- $\bullet OH$ (hydroxyl radical)
- $O_3$ (ozone)
- $OCl^-$ (hypochlorite ion)
- $Cl^-$ (chloride ion)
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The Correct Option is D
Solution and Explanation
- $\bullet OH$ (hydroxyl radical) is highly reactive and used as an active disinfectant in water treatment due to its strong oxidation properties.
- $O_3$ (ozone) is a powerful oxidizing agent and is commonly used as an active disinfectant in water treatment.
- $OCl^-$ (hypochlorite ion) is commonly used as a disinfectant in water treatment and is derived from chlorine.
- $Cl^-$ (chloride ion) is the ionized form of chlorine and does not have disinfectant properties. It is stable and does not have significant oxidative properties, thus it is not an active disinfectant.
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