Dnyan Deshmukh Staff member Pune Jan 18, 2018 #1 The most commonly used disinfection of swimming pool water is by - (a) alum (b) nitrogen (c) lime (d) chlorine. The correct Answer Is (d) chlorine Reactions: Sumit Civil
The most commonly used disinfection of swimming pool water is by - (a) alum (b) nitrogen (c) lime (d) chlorine. The correct Answer Is (d) chlorine