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Ozone saves the biosphere by absorbing t...

Ozone saves the biosphere by absorbing the high energy radiation called:

A

Infra-red (IR)

B

Ultraviolet ray (UV)

C

X-ray

D

Gama rays

Text Solution

Verified by Experts

The correct Answer is:
B
Ozone layer present in the stratosphere helps the earth atmosphere from incoming UV rays as it causes skin cancer, cataract etc.
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When heathly earth's stratosphere contains a low concentration of ozone (O_(3)) that absorbs potentially harmful ultraviolet (UV) radiations by the cycle shown below: Chloroflouro carbon refrigerants, such as freon 12(CF_(2)Cl_(2)) , are stable in lower atmosphere but in the stratosphere, they absorb high energy UV radiation to generate chlorine radicals. CF_(2)Cl_(2) overset(hv)(to) CF_(2)Cl+Cl The presence of small number of chlorine radicals appears to lower ozone concentrations dramatically. The following reactions are all known to be exothermic (except the one requiring light) and to have high rate constant. A:Cl-O-O-Cloverset(hv)(to)O_(2)+2Cl^(*) B: Cl_O^(*)+O to O_(2)+Cl^(*) C:Cl^(*)+O_(3) to Cl-O^(*)+O_(2) D:2Cl-O^(*) to Cl-O-O-Cl Q. Ozone has the ability to absorb

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