Environmental Issues Class 12 MCQs Questions with Answers

1. Common indicator organism of water pollution is:

2. The powder of recycled modified plastic is called

3. Nutrient enrichment of water bodies causes:

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

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

6. The Chipko movement was launched for protection of_________

7. BOD in river water_________

8. Natural air pollutant are:

9. Which metal inactivates a catalytic converter?

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

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

12. DDT can cause

13. The greenhouse gases are

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

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

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

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

18. Acid Rain comes under which type of pollution?

19. Act formulated in 1996 was:

20. Global warming can be controlled by__________