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Q: Which of the following is an objective of aeration of water?
  • A. To increase the carbon dioxide content of water
  • B. To preserve hydrogen sulphide
  • C. To remove tastes and odours from the gases produced due to organic decomposition
  • D. To decrease the dissolved oxygen content of the water
Correct Answer: Option C - • Aeration brings water and air in close contact in order to remove dissolved gases (such as carbon dioxide) and oxidizes dissolved metals such as iron, hydrogen sulfide (H₂S), and volatile organic chemicals (VOCs). • Oxygen is added to water through aeration and can increase the palpability of water by removing the flat taste.
C. • Aeration brings water and air in close contact in order to remove dissolved gases (such as carbon dioxide) and oxidizes dissolved metals such as iron, hydrogen sulfide (H₂S), and volatile organic chemicals (VOCs). • Oxygen is added to water through aeration and can increase the palpability of water by removing the flat taste.

Explanations:

• Aeration brings water and air in close contact in order to remove dissolved gases (such as carbon dioxide) and oxidizes dissolved metals such as iron, hydrogen sulfide (H₂S), and volatile organic chemicals (VOCs). • Oxygen is added to water through aeration and can increase the palpability of water by removing the flat taste.