engineering chemistry MCQ #3072

The COD of a water sample is

engineering chemistry MCQ #3072

  1. Question 1

    Q1. The COD of a water sample is

    • A) Always less than BOD
    • B) Always greater than BOD
    • C) Equal to BOD
    • D) Unrelated to BOD

    Answer: Always greater than BOD

    Explanation: COD measures oxygen required to oxidize all organic matter, while BOD measures oxygen consumed by microorganisms