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What is the correct answer?

4

Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely

B. Activated carbon can be used for taste & odour control without subsequent filtration

C. Application of activated carbon reduces the temporary hardness of water

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation

Correct Answer :

D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation


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