Consider following statements about the Ozone Hole Ozone formation and destruction keep on happening...........

Environment and Ecology (Easy) Envirnment and Climate Change

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Consider following statements about the Ozone Hole

Ozone formation and destruction keep on happening
Ozone destruction rate is higher than its formation rate
Ozone destruction rate is equal to the its formation rate

Which of above statement is/ are true?

(I) only

(I) and (II) Only

(I) and (III)

(III) Only

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Explanation:

In an pollution free stratosphere, the production and destruction of ozone are in balance and hence the concentration of O3 remains constant with time. When CFC’s are released into the lower troposphere, they diffuse up into the stratosphere since their lifetime is 50-100 years when CFCs reach the middle stratosphere, UV radiation liberates the chlorine atom.

CFC + UV → Cl

Cl is then able to destroy as many as 100,000 O3 molecules.

Hence option 2nd is correct.