Which of the following is a part of the inorganic impurities of the sewage?
  1. Pesticides
  2. Urea
  3. Phosphates
  4. Vegetable waste

AcademicChemistryNCERTClass 7

Correct Answer: (c) Phosphates

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

Updated on 10-Oct-2022 13:22:17