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Question : (a) What are the effects of ozone depletion? (B)BOD is an index of water pollution. Comment.

Answer»

Solution :The BOD TEST measures the rate of UPTAKE of oxygen by microorganisms in a sample of water and thus INDIRECTLY BOD is a measure of the ORGANIC matter present in the water. The greater the BOD of waste water, more is its POLLUTING potential.


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