Question:medium

In sewage water, which of the following is expected to be present in the highest quantity (mg/L)?

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COD is a key parameter in water quality analysis, often exceeding other oxygen demand indicators.
Updated On: Feb 20, 2026
  • Dissolved oxygen
  • Chemical oxygen demand
  • Carbonaceous biochemical oxygen demand
  • Nitrogenous biochemical oxygen demand
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The Correct Option is B

Solution and Explanation

1. Chemical oxygen demand (COD) quantifies the total oxygen needed to oxidize organic and inorganic matter, with the highest levels found in sewage water.
2. Dissolved oxygen (DO) is typically low in sewage due to microbial activity.
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