Environmental Issues Class 12 MCQs Questions with Answers

1. Common indicator organism of water pollution is:

2.  A river with inflow of domestic sewage rich in organic waste may result__________

3. The powder of recycled modified plastic is called

4. Rain is called acid rain, its pH is below:

5. Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of_________

6. The greenhouse gases are

7. Which metal inactivates a catalytic converter?

8. Act formulated in 1996 was:

9. BOD in river water_________

10. Natural air pollutant are:

11. Global warming can be controlled by__________

12. Bhopal gas tragedy of 1884 took place because methyl isocyanate reacted with:

13. DDT can cause

14.  In an area where DDT had been used extensively, the bird population declined significantly due to_________

15. Acid Rain comes under which type of pollution?

16. Presence of large amount of nutrients in water cause excessive growth of

17. The dB is a standard abbreviation used for the quantitative expression of:

18. The agents that bring undesirable changes in the environment arc called

19. Nutrient enrichment of water bodies causes:

20. The Chipko movement was launched for protection of_________