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प्रश्न
Which of the following is a part of the inorganic impurities of the sewage?
विकल्प
Pesticides
Urea
Phosphates
Vegetable waste
उत्तर
Phosphates
Explanation:
Various metals and phosphates are inorganic impurities of sewage, while pesticides, urea and vegetable wastes are organic impurities.
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