12.BOD is measured for A. Estimating amount of organic matter in sewage B. Knowing efficiency of RBCs for carrying oxygen C. Working out efficiency of oil driven automobile engines D. Measuring activity of Saccharomyces cerevisae in producing curd
Option A. Biological oxygen demand or BOD is the oxygen in milligrams required for five days in one litre of water at 20 degree centigrades for the microorganisms to metabolise organic waste. Low pollution level is indicated by below 1500 mg/lit, medium pollution level is indicated by 1500 to 4000 mg/lit and high organic pollution level is indicated by above 4000 mg/lit.
