Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science Environmental Chemistry Analytical Methods
What will be BOD5 for a wastewater sample when 21 ml of sample is diluted to 300 ml in BOD bottle to determine dissolved oxygen.
[Given: Initial DO1 = 10 mg/l; Five days later DO5 = 5 mg/l]
1
~5 mg/l
2
~25 mg/l
3
~71.4 mg/l
4
~75 mg/l