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28/09/2020 12:10 pm
Topic starter
Ozone in stratosphere extends
(a) 10-20 km
(b) 20-25 km
(c) 15-30 km
(d) 25-40 km
1 Answer
1
28/09/2020 12:13 pm
(b) 20-25 km
Explanation:
Stratosphere extends from 20-25 km above tropospheres. It is also called ozonosphere due to presence of ozone. Temperature increases in this zone (upto 90°C) due to ozone formation. Ozone protects Earth from harmful ultraviolet radiations of the sun.
Oxides of Nitrogen + Unburnt Hydrocarbons + UV-rays → O3(Ozone) + PAN (Peroxy acetyl nitrate)