<prompt> In chlorination of water, the main disinfecting action is due to:-Hydrogen ionsHydrochloric acidHypochlorous acidChloride ions  <response>: Chlorination of water: - Used for large scale purification of water for drinking water. Disinfection action of chlorine in water is due to: Hypochlorous acid - major role in disinfection HOCl. Hypochlorite ions - minor role in disinfection. Chloride has residual germicidal effect. It kills bacteria, many viruses but not spores . It oxidizes iron, manganese hydrogen sulphide. It also destroys taste odorproducing components. Chlorine acts best as a disinfection for water at: pH around 7.0 