Sawaal
4
Q:

Removal of oil and grease from sewage [waste water]

A) Skimming B) Filtration
C) Screening D) None of the above

Answer:   A) Skimming



Explanation:

Skimming is the removal of any material or particles that are floating on the surface. Hence, Removal of oil and grease from sewage - waste water is called as skimming.

Subject: Chemistry
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