COMEDK Exam 2015 Solved Paper

Question : 80 of 180

Marks: +1, -0

BOD is a measure of

ozone depletion in the stratosphere due to too many free radicals.
suspended particulate matter in the air causing lung problems.
pesticides which are non-biodegradable in the soil and water.
organic material present in water needing dissolved oxygen to break them down depleting oxygen content in water.

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