Which one of the following statement regarding BOD is true?

The greater the BOD of waste water, more is its polluting potential.

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The greater the BOD of waste water, less is its polluting potential.

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The lesser the BOD of waste water, more is its polluting potential.

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The lesser the BOD of waste water, less is its polluting potential

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Solution

The correct option is A The greater the BOD of waste water, more is its polluting potential.
BOD is the method of determining the amount of oxygen required by microorganisms to decompose the waste present in the water supply. It is a measure of organic matter present in the water. If the quantity of organic wastes in the water supply is high then the number of decomposing bacteria present in the water will also be high. As a result, BOD value will be higher.

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