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General Science (CTET)
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Biochemical oxygen demand is __________ in polluted water and ____________ in potable water.
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💡 Explanation:
Biochemical oxygen demand is more in polluted water and less in potable water. A low BOD is an indicator of good quality water, while a high BOD indicates polluted water. There are generally no standards for an absolute BOD value of drinking water. However, a sample with a BOD between 1 and 2 mg/L indicates a very clean water.