Biological treatment of water pollution is done with the help of:

Related Mcqs:

1. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

   A. Phosphene B. SiF4 C. Dust D. Halogens...

2. Escherichia coli is used as an indicator organism to determine pollution of water with:

   A. Heavy metals B. Faecal matter C. Industrial effluents D. Pollen of aquatic plants...

3. Water pollution:

   A. Increases oxygenation B. Decreases turbidity C. Increases turbidity deoxygenation D. Increases photosynthesis...

4. Most harmful heavy metals causing water pollution:

   A. Pb, Hg, Cr, Cd B. P,Mn,B,Mg C. N,K,Mo D. Zn,Mo,Mg,Ag...

5. The sea water gets pollution mainly due to:

   A. Industrial waste B. Oil spills C. Death of marine fauna D. None of these...

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

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

7. The ground water pollution is due to excess of:

   A. DDT is a growth retardant B. Pesticides C. Minerals D. Carbon deposit...

8. Thermal pollution in water bodies is caused due to discharge of:

   A. Hot water from power plants B. Hot chemicals from industries C. Waste from mines D. Waste from agricultural fields...

9. The cause of water pollution?

   A. Smoke B. 2, 4-D and pesticides C. Automobile exhaust D. Aeroplanes...

10. If water pollution continues at its present rate, it will eventually:

    A. Make oxygen molecules unavailable to aquatic life B. Make nitrates unavailable to aquatic life C. Prevent precipitation D. Stop the water cycle...