NCERT Exemplar Solutions Class 7 Science Solutions for Wastewater Story - Exercise in Chapter 18 - Wastewater Story

Question 34 Wastewater Story - Exercise

What are the different types of inorganic and organic impurities generally present in sewage?


(i) Inorganic impurities – nitrates, phosphates and metals.

(ii) Organic impurities – fruit and vegetable wastes, oil, urea, human faeces, animal waste, pesticides and


Video transcript
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