Question

3. how is ozone formed in the upper atmosphere? why is the damage of ozone layer a cause of concern to us? state a cause of this damage. (in points)​

Answer 1

1. How is Ozone formed in the upper atmosphere?

And. Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation (sunlight) and oxygen molecules, which make up 21% of the atmosphere. In the first step, solar ultraviolet radiation breaks apart one oxygen molecule (O2) to produce two oxygen atoms (2 O) (see Figure Q2-1).

2. Why is the damage of Ozone layer a cause of concern to us?

Ans. The depletion of ozone causes the harmful UV rays to reach the earth and this has resulted in increased incidence of skin cancers in humans. UV rays may also cause genetic mutations in living organisms. To limit the damage to the ozone layer, the release of CFCs into the atmosphere must be reduced.

Answer 2

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Answer:

O2—UV—>O + O

O + 02 —> O3 (ozone)

Certain harmful chemicals such as chlorofluorocarbons (CFCs), are released into the air. These accumulate in the upper atmosphere and react with ozone resulting in reduction of the ozone layer by forming a hole. Thus, ozone layer becomes thinner and gets depleted allowing more ultraviolet rays to pass through the earth’s atmosphere. These radiations are highly damaging to organisms and cause skin cancer, damage to eyes, including increased incidence of cataract and damage to immune system of human beings and other animals.