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The meaning BOD(5) is...

The meaning `BOD_(5)` is

A

waste decomposed in 5 days

B

oxygen used in 5 days

C

microorganims killed in 5 days

D

dissolved oxygen left after 5 days

Text Solution

Verified by Experts

`BOD_(5)` means oxygen used in 5 days.
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Assertion : The amount of BOD in the water is a measure of the amount of organic material in the water . Reason : Clear water has BOD less than 5 ppm whereas highly polluted water can have BOD value of 17 ppm or more .