<prompt> Select the inappropriate statement about Chlorination of waterChlorine best act at pH 7.2 of waterThe minimum recommended concentration of free chlorine is 0.5 mgL for one hourHypochlorous acid play main role in disinfectionChloroscope instrument is used to measure residual chlorine  <response>: Chlorine best act at as a a disinfectant when the pH of water is7 because of predominance of Hypochlorous acid. 2.5mg bleaching powder can disinfect 1000 L of water. Chlorine has no effect on spores, cyst, ova, Hep. A, Polio virus, cyclopes. Remaining all options given are true. 