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Question
Pick out the true statement pertaining to water treatment.
Options:
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 coagulent prior to sedimentation.
Answer: Option D
Answer: (d).Normally, the turbidity is removed by adding a coagulent prior to sedimentation.

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