A. Increases
B. Slightly decreases
C. Remains unchanged
D. Decreases drastically
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The correct answer to the question: "When excess of sewage is dumped in the river, its BOD:" is "Increases ".
A. Increases
B. Slightly decreases
C. Remains unchanged
D. Decreases drastically
A. River is polluted
B. River is not polluted
C. River is day
D. None of these
A. More
B. Less
C. Equal
D. Somewhere more somewhere less
A. High
B. Low
C. Same
D. None of these
A. Industrial wastes poured into water bodies
B. Extent to which water is polluted with organic compounds
C. Amount of carbon monoxide inseparably combined with haemoglobin
D. Amount of oxygen needed by green plants during night
A. Organic matter
B. Microbes
C. Both (a) & (b)
D. None of these
A. Present in water
B. Utilized by organisms in water
C. Utilized by micro-organisms for decomposition
D. Demanded by the producers for the production of food
A. Biotic oxygen deduction
B. Base of degradation
C. Biotic oxide demand
D. Biological oxygen demand
A. Decreases
B. Increases
C. Remains the same
D. Is no measure of pollution
A. Algae
B. Moss
C. Ferns
D. Distillated wastes
A. Algae
B. Sand
C. Moss
D. Sugar mill effluents
The correct answer to the question: "When excess of sewage is dumped in the river, its BOD:" is "Increases ".
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