Which of the following statements is wrong? 
(i) Ozone is not responsible for the greenhouse effect. 
(ii) Ozone can oxidize Sulphur dioxide present in the atmosphere to Sulphur trioxide. 
(iii) Ozone hole is thinning of the ozone layer present in the stratosphere. 
(iv) Ozone is produced in the upper stratosphere by the action of UV rays on oxygen. 

<p>This is a Multiple Choice Questions as classified in NCERT Exemplar</p><p>Option (i) i.e., Ozone is not responsible for greenhouse effect is the answer since O3 is responsible for the greenhouse effect, its contribution is about 8%&nbsp; to 10%. About 75% of the solar energy reaching the earth is absorbed by the earth's surface, which increases its temperature. The rest of the heat radiates back to the atmosphere while some of the heat is trapped by gases such as carbon dioxide, methane, ozone, chlorofluorocarbon compounds (CFCs) and water vapour in the atmosphere. Thus, they add to the heating of the atmosphere. This is the reason behind global warming.</p>

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