When excess of sewage is dumped in the river, its BOD:

Related Mcqs:

1. In a river, if its BOD is high, then:

   A. River is polluted
   B. River is not polluted
   C. River is day
   D. None of these

2. BOD value of sewage water than that of tap water is:

   A. More
   B. Less
   C. Equal
   D. Somewhere more somewhere less

3. As compared to tap water the BOD of sewage polluted water shall be:

   A. High
   B. Low
   C. Same
   D. None of these

4. Biological Oxygen Demand (BOD) is a measure of:

   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

5. BOD is connected with:

   A. Organic matter
   B. Microbes
   C. Both (a) & (b)
   D. None of these

6. BOD is the amount of oxygen:

   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

7. BOD stands for:

   A. Biotic oxygen deduction
   B. Base of degradation
   C. Biotic oxide demand
   D. Biological oxygen demand

8. With the increase in water pollution, the BOD:

   A. Decreases
   B. Increases
   C. Remains the same
   D. Is no measure of pollution

9. BOD of polluted water is increased by

   A. Algae
   B. Moss
   C. Ferns
   D. Distillated wastes

10. Which of the following enhances BOD of water?

    A. Algae
    B. Sand
    C. Moss
    D. Sugar mill effluents