Virtual Labs

a: Dark yellow to green b: Green to pale yellow c: Dark yellow to pale yellow d: None of the above

a: Starch b: Phenolphthalein c: Methyl orange d: Methylene blue

a: 5 day BOD is the ultimate BOD b: 5 day BOD is less than 4 day BOD keeping other conditions same c: 5 day BOD is greater than 4 day BOD keeping other conditions same d: BOD does not depend on time

a: High turbidity b: Less water quality c: Better water quality d: Excessive aquatic plant or algae blooms

a: Dissolve Oxygen / Dilution Factor b: Dissolve Oxygen + Dilution Factor c: Dissolve Oxygen - Dilution Factor d: Dissolve Oxygen * Dilution Factor

Determination of Biological Oxygen Demand