Question

-- is an organic
impurity present in sewage
*
O polythene
O spoiled food

glass pieces
O pesticides​

Answer 1

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O pesticides

Explanation:

(1) The organic impurities present in sewage are: Human faeces, Animal waste (like Animal dung), Urea (as Urine), Oil, Fruit and Vegetable wastes, Pesticides, and Herbicides, etc.

(2) The inorganic impurities present in sewage are: Nitrates, Phosphates and Metals.