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Applied Chemistry 1: Water
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Applied Chemistry 1: Water
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25 Questions

1. Which of the following does not cause the permanent hardness in water?
2. The water after removing of sludge in the biological oxidation process is treated with ____________
3. COD is the short form of the chemical oxygen demand.
4. The soft water contains the hardness of about ____________
5. Deep well water possess the rotten egg smell due to the dissolved ________
6. Well water in wells located in the areas of oil and gases will contain __________
7. Non hazardous organic wastes from the sewage is to be separated from the ___________
8. The disappearance of the plants and animals is due to the _________ in water.
9. Batch process is only used for removing the hardness of the water on _________
10. ___________ is the purest form of the water obtained by natural distillation.
11. The optimum value in natural water is ________
12. Which of the following method is not the method of desalination?
13. Domestic water treatment is carried out under __________ conditions.
14. The colour and odour of the natural water is due to the presence of the ___________
15. The mineral free water is not used in __________
16. __________ imparts peculiar odour to the water.
17. The total __________ are removed completely in the ion exchange process.
18. In the case of the zeolites, ion exchange process do not function properly because of the __________
19. The organic matter present in the water is of __________ types.
20. In domestic water treatment, after the primary treatment _________ is done.
21. Due to heating at high temperature in the hot lime soda process reduces the __________
22. Waste water released from _________ are not the sources of bacteria.
23. Periodic cleaning is used to _________
24. In lime soda process, the change in the hardness of the water needs ________
25. The depth of the rectangular circular tanks in the trickling filters method is having the depth of ____________

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