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Question
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be ______.
Options
highly polluted
poor in dissolved oxygen
rich in dissolved oxygen
low COD
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Solution
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be rich in dissolved oxygen.
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Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted.
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