| 1. It absorbs most of the Ultraviolet radiation found the Sun's rays. |
| 2. Chlorofluorocarbons are serious threat to the ozone layer. |
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither 1 nor 2
Correct Answer: C
Solution :
The ozone layer is a layer in Earth's atmosphere which contains relatively high concentrations of ozone (03). This layer absorbs 97-99% of the sun's high frequency ultraviolet light which is potentially damaging to life on earth. Over 90% of ozone in earth's atmosphere is present here. It is mainly located in the lower portion of the stratosphere from approximately 15 km to 35 km above Earth's surface, though the thickness varies seasonally and geographically.
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