1.

A river is the source of water for water supply to a town. Its water is very turbid and polluted. The correct sequence of steps for treating the river water would be :

A. Presedimentation -> prechlorination -> coagulation -> sedimentation -> filtration -> post chlorination
B. coagulation -> sedimentation -> post-chlorination
C. coagulation -> filtration -> sedimentation -> post-chlorination
D. sedimentation -> post-chlorination
Answer» B. coagulation -> sedimentation -> post-chlorination


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