Arrange the following options in the ascending order of their BOD value.

I. Sample of highly polluted pond water.
II. Sample from unpolluted pond water.
III. Distilled water.

Question

Arrange the following options in the ascending order of their BOD value. I. Sample of highly polluted pond water. II. Sample from unpolluted pond water. III. Distilled water.

TestHub · Accepted Answer

Biochemical oxygen demand is the oxygen in milligrams required for five days in one litre of water at 20°C for the microorganisms to metabolize organic waste. BOD increases with an increase in pollution.

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