Question

Which of the following is/are not the methods of measuring water pollution?

• A. Biomagnification
• B. Eutrophication
• C. BOD
• D. Green chemistry

Answer 1

Answer: (A), (B), (D)

Green chemistry

Biomagnification: Concentration of insoluble and non-biodegradable toxins increases while transported from lower to higher trophic levels via food chain. Concentration increases 10 times at each trophic level.

Eutrophication is a process in which nutrient enriched water bodies support a dense plant population, which kills
animal life by depriving it of oxygen and results in subsequent loss of biodiversity

Biochemical oxygen demand (BOD) is the amount of dissolved oxygen needed (i.e demanded) by aerobic biological organisms to break down organic material present in a given water sample at a certain temperature over a specific time period.

Green chemistry is a cost effective approach which involves the reduction of material, energy consumption and waste generation.

Only BOD is a measurement of water pollution.

Option (a),(b) and (d) are correct.