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Question
Assertion :UV-radiation causes photo dissociation of enzyme into O2 and O. Thus causing damage to the stratospheric ozone layer. Reason: Ozone hole is resulting in global warming and climate change.
Assertion :UV-radiation causes photo dissociation of enzyme into O2 and O. Thus causing damage to the stratospheric ozone layer. Reason: Ozone hole is resulting in global warming and climate change.
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Solution
The correct option is D Both Assertion and Reason are incorrect
- Stratospheric ozone is formed in the ozone layer by a two step mechanism initiated by the action of UV radiation on the oxygen molecules. In the first step, UV radiation dissociates molecular oxygen into two single oxygen atoms. In the second step, the free oxygen atoms combine with oxygen molecule to form ozone. The destruction of this stratospheric ozone is caused by the chemicals containing chlorine and bromine, e.g., chlorofluorocarbons (CFCs).
- The ozone depletion and global warming are not the same thing, and neither is the main cause of other. However, the CFCs that destroy ozone are also potent greenhouse gases. They are present in smaller traces in the atmosphere but considered as one of the contributor of greenhouse effect. Both assertion and reason are incorrect. So, the correct option is D.
- Stratospheric ozone is formed in the ozone layer by a two step mechanism initiated by the action of UV radiation on the oxygen molecules. In the first step, UV radiation dissociates molecular oxygen into two single oxygen atoms. In the second step, the free oxygen atoms combine with oxygen molecule to form ozone. The destruction of this stratospheric ozone is caused by the chemicals containing chlorine and bromine, e.g., chlorofluorocarbons (CFCs).
- The ozone depletion and global warming are not the same thing, and neither is the main cause of other. However, the CFCs that destroy ozone are also potent greenhouse gases. They are present in smaller traces in the atmosphere but considered as one of the contributor of greenhouse effect. Both assertion and reason are incorrect. So, the correct option is D.
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