suspended impurities dissolved impurities both suspended and dissolved impurities none of the above
Answer Discuss in Comment
platinum cobalt scale standard platinum scale standard silica scale standard cobalt scale
starch iodide method orthotolidine method both (a) and (b) none of the above
residual chlorine biochemical oxygen demand dose of coagulant dissolved oxygen
removal of hardness complete sterilisation removal of turbidity killing of disease bacteria
applied chlorine difference of applied and residual chlorine residual chlorine sum of applied and residual chlorine
pre-chlorinatlon break point chlorination post chlorination super chlorination
de-chlorination hypo-chlorination super chlorination pre-chlorination
increases decreases remains unaffected none of the above
dead end system ring system radial system grid iron system
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