Removal of ______________ is accomplished by aeration of water?
Correct answer: D. Dissolved gases
- A. None of these
- B. Suspended solids
- C. Dissolved solids
- D. Dissolved gases
Explanation
Aeration brings water into contact with air and strips volatile dissolved gases such as carbon dioxide and hydrogen sulphide. Suspended solids require settling or filtration, while dissolved salts are not removed by ordinary aeration.
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