Which of the following is a part of the inorganic impurities of the sewage?

1. Pesticides
2. Urea
3. Phosphates
4. Vegetable waste

Correct Answer: (c) Phosphates

Explanation: Various metals and phosphates are inorganic impurities of sewage, while pesticides, urea and vegetable wastes are organic impurities.

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Updated on: 31-Jan-2023

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