Virtual Labs

a: A measure of the biological activity of water and waste water b: An organism's natural level of oxygen requirements c: Oxygen content of water and waste water d: The oxygen using potential of water and waste water

a: 20°C b: 15°C c: 25°C d: 30°C

a: Dicyandiamide b: Ammonium thiosulfate c: 2-chloro-6 ( trichloromethyl ) pyridine (TCMP) d: Nitropyrene

a: Less polluted b: Highly polluted c: Not polluted d: None of the above

a: To avoid mixing of air bubbles with the sample b: To maintain the temperature of sample c: To protect it from sunlight d: All of the above

Determination of Biological Oxygen Demand