In one of the stages of wastewater treatment, the solid impurities are allowed to settle down at the bottom. This particular stage in the entire purification is called ___

Sublimation

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Sedimentation

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Chlorination

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Evaporation

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Solution

The correct option is B
Sedimentation

Sedimentation is the tendency for larger insoluble particles in a solution (when left undisturbed) to settle down under gravity. It is a separation technique used in wastewater treatment to naturally allow suspended solid impurities to settle down.

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In the treatment of water, solid impurities are allowed to settle at the bottom. This particular stage in the entire purification is called ___

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