Trying to find the right answer to this..

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

11.

Give one harmful effect of classical smog.

277 Views

12.

What is PAN?

130 Views

13. Name the components of photochemical smog which cause irritation of eyes.

155 Views

14.

What is the nature of London smog and photochemical smog?

189 Views

H₂SO₄, HNO₃ and HCl.

112 Views

16.

What is marine pollution?

132 Views

17.

Define chemical oxygen demand (COD).

305 Views

18.

Why is COD preferred over BOD?

211 Views

19.

Which main compounds are causing damage to ozone layer?

181 Views

20. Which disease will be caused due to hole in the ozone layer and why?

114 Views