12 Questions
What is the main concern about bottled water safety?
The total dissolved solids (TDS) level
What is a characteristic of hard water?
Contains dissolved calcium and magnesium salts
Why is rain water considered safe for drinking?
It is free from harmful contaminants
What is the primary concern regarding ocean water for drinking purposes?
High total dissolved solids (TDS) level
What is the disadvantage of sterilizing water with Bleaching powder (CaOCl2)?
It is very expensive
Which method introduces calcium in water during the conditioning process?
Carbonate conditioning
What does the Lime Soda Process involve in water treatment?
Introduces calcium in water
What are ion exchange resins used for in the water treatment process?
Demineralization process
What method is used to estimate water hardness?
Titrimetric Method
What color does the weak complex of metal ion and EBT form?
Wine red
Which method is used to sterilize and disinfect water through oxidation?
Ozonisation (O3)
What is the advantage of UV treatment for water sterilization?
Bactericidal and sporicidal
Test your knowledge on the water cycle, sources of drinking water, and distribution of Earth's water. Explore topics such as surface waters, underground water, and global access to safe drinking-water services.
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