Objective Type Questions \( \mathrm{P} \) Measurement of dissolved ...

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Objective Type Questions
\( \mathrm{P} \)
Measurement of dissolved oxygen that would be
W needed by the microorganism to oxidise the compounds is known as
(1) Acid rain
(2) BOD
(3) \( \mathrm{COD} \)
(4) Ozone layer depletion
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