Chemical Process
Bio-degradable detergents

Have an isoparaffinic structure
Pose problem in sewerage plant
Should not be used as it spoils the cloth
Can be readily oxidised

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Chemical Process
Pick out the true statement pertaining to water treatment.

Normally, the turbidity is removed by adding a coagulent prior to sedimentation
Slow sand filters can remove colour completely
Application of activated carbon reduces the temporary hardness of water
Activated carbon can be used for taste & odour control without subsequent filtration

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