What does ${\rm{BO}}{{\rm{D}}_5}$ represent?

Biological ozone depletion in five days

Dissolved oxygen left after five days

Micro-organisms killed by ozone in sewage treatment plants in five hours

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NEET UG CHEMISTRY MCQ: ENVIRONMENTAL CHEMISTRY

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What does

\mathrm{BO}{\mathrm{D}_5}

represent?

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Correct option: C

Dissolved oxygen consumed in five days

Option C (Dissolved oxygen consumed in five days) is correct because BOD5 specifically measures the amount of oxygen consumed by microorganisms in a water sample over a 5-day period.

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