Social & Preventive Medicine Select the inappropriate statement about Chlorination of water A Chlorine best act at pH 7.2 of water B The minimum recommended concentration of free chlorine is 0.5 mg/L for one hour C Hypochlorous acid play main role in disinfection D Chloroscope instrument is used to measure residual chlorine 💡 Explanation Select the inappropriate statement about Chlorination of water ✓ Correct Answer: A. Chlorine best act at pH 7.2 of water