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Reported Question / Answer
Q.) Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in
1)
oxidation of carbonaceous matter to CO2
2)
coagulation and flocculation of colloids.
3)
all (, ( and (.
4)
nitrification or oxidation of ammonia derived from breakdown of nitrogeneous organic matter to the nitrite and eventually to the nitrate
5)
NULL
Answer :
3
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