Environmental Issues Class 12 MCQs Questions with Answers

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

2. Natural air pollutant are:

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

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

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

6. Common indicator organism of water pollution is:

7. Global warming can be controlled by__________

8. The greenhouse gases are

9. The Chipko movement was launched for protection of_________

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

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

12. The powder of recycled modified plastic is called

13. Act formulated in 1996 was:

14. Acid Rain comes under which type of pollution?

15. BOD in river water_________

16. Nutrient enrichment of water bodies causes:

17. DDT can cause

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

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

20. Which metal inactivates a catalytic converter?