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Class 12 Biology Practice Test: Environmental Issues - Water Pollution and its Control
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Avg score: 80% • Most missed: “When the government of India did pass the Water (Prevention and Control of Pollu…”
Class 12 Biology Practice Test: Environmental Issues - Water Pollution and its Control
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20 Questions

1. How much percent of impurities are enough to make domestic sewage unfit for humans?
2. Which of the following are the dissolved materials present in domestic sewage?
3. When the government of India did pass the Water (Prevention and Control of Pollution) Act?
4. How much amount of dissolved oxygen does gravely polluted water consists of?
5. When the government of India did pass the Water (Prevention and Control of Pollution) Act?
6. Which of the following are the colloidal materials present in domestic sewage?
7. What is the reason for the increase in the BOD?
8. What should be the amount of BOD in the drinking water?
9. How is the amount of biodegradable organic matter in sewage water estimated?
10. What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes?
11. Who is responsible for the degradation of biodegradable organic matter present in the domestic sewage?
12. What should be the amount of BOD in the drinking water?
13. What amount of BOD indicates low water pollution?
14. What do BOD and COD stand for?
15. Which sewage contains biodegradable waste such as organic matter?
16. What is the excess growth of plankton in water due to the presence of nutrients called?
17. What happens when the maximum amount of oxygen in the upstream of sewage discharge is utilized by microbes?
18. Which of the following are the dissolved materials present in domestic sewage?
19. What amount of BOD indicates high water pollution?
20. Which of the following are the suspended solids in the domestic sewage?

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