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प्रश्न
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be ______.
विकल्प
highly polluted
poor in dissolved oxygen
rich in dissolved oxygen
low COD
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उत्तर
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be rich in dissolved oxygen.
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संबंधित प्रश्न
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