NEET 2012 Biology question

Not in NEET syllabus

Measuring Biochemical Oxygen Demand (BOD) is a method used for

(1)Working out the efficiency of R.B.Cs. about their capacity to carry oxygen
(2)Estimating the amount of organic matter is sewage waterCorrect
(3)Working out the efficiency of oil driven automobile engines
(4)Measuring the activity of Sacccharomyces cerevisae in producing curd on a commercial scale

Answer: (2)

Solution

BOD is the amount of oxygen consumed by microbes in oxidising the organic matter in a sample of water. The greater the BOD, the more organic matter (and the more polluted the water); BOD is therefore used to estimate the organic load of sewage

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Question ID VK-091166