engineering chemistry MCQ #3085

A water sample has a COD of 100 mg/L. What does it indicate?

engineering chemistry MCQ #3085

  1. Question 1

    Q1. A water sample has a COD of 100 mg/L. What does it indicate?

    • A) Low organic pollution
    • B) High organic pollution
    • C) Presence of inorganic pollutants
    • D) High dissolved oxygen

    Answer: High organic pollution

    Explanation: COD (Chemical Oxygen Demand) measures the oxygen required to oxidize organic matter; high COD indicates high organic pollution.