Question: which one of the following forms of chlorine has no disinfectant property?
Answer: Trichloramine has no disinfection properties and also it is volatile. Di and trichloramines have very low taste and odour threshold concentrations. Monochloramine can be preformed as a solution of 1.5 g Cl2/l by reacting ammonium sulphate with sodium hypochlorite in the presence of caustic soda at pH of about 10.