11. Which of the following is the most major constituents of air pollutants?
12. __________ plant emits large amount of SO2 as an air pollutant.
13. In water chemical treatment plant, use of chloramines ensures
14. Hydrogen ion concentration in distilled water is
15. A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called
16. The most commonly used chemical coagulant in water treatment is
17. Lagooning process is mainly a means of the
18. The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.
19. The main industrial source of emission of hydrogen sulphide air pollutant is
20. Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
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