19. Match the items of Column I with the items of Column II with reference to sewage. Column I Column II a) Inorganic impurities i) Phosphorus and Nitrogen b) organic impurities ii) Nitrates and Phosphates c) Nutrients iii) Cholera and Typhoid d) Bacteria iv) Pesticides and Herbicides
ScienceClass 7CBSEAnswered 27 Mar 2026
Answer
Soln:
| Column I | Column II |
| a) Inorganic impurities | ii) Nitrates and Phosphates |
| b) organic impurities | iv) Pesticides and Herbicides |
| c) Nutrients | i) Phosphorus and Nitrogen |
| d) Bacteria | iii) Cholera and Typhoid |
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