Sewage does not contain any inorganic impurities.
Question 14
Name two inorganic impurities present in sewage.
Question 23
What are the different types of inorganic and organic impurities generally present in sewage?
Question 8
Which of the following is a part of inorganic impurities of the sewage? (a) Pesticides (b) Urea (c) Phosphates (d) Vegetable waste