Assignments
 

• Why BOD test is used in water pollution control? Discuss.
• In this experiment, you have found the addition of MgSO₄ and Con.H₂SO₄ into water sample as a critical step. Find out the purpose of adding both MgSO₄ and Con.H₂SO₄ in BOD experiment.
• List out all the precautions have to take while performing a BOD test in the lab.
• If a white precipitate appears instead of brown on addition of magnesium sulfate solution and alkaline potassium iodide solution, what does this indicate about the water sample?
• The sample bottles should be completely filled in BOD test. Why?