Ozone is formed in the upper layer of the atmosphere from oxygen by action of:____________?
Correct answer: D. UV -rays
- A. Free radicals
- B. Cosmic rays
- C. Nitrogen oxides
- D. UV -rays
Explanation
Ultraviolet rays split O2 molecules into oxygen atoms, and these atoms then combine with O2 to form O3 in the upper atmosphere. The likely mistake is choosing cosmic rays because they are also high-energy radiation, but ultraviolet radiation is the principal agent in the usual atmospheric ozone-formation process.
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About Redox Reactions
Redox reactions involve oxidation and reduction occurring together, with electrons transferred between species or oxidation numbers changing. The topic covers assigning oxidation states, identifying oxidizing and reducing agents, balancing redox equations by oxidation number or half-reaction methods, and connecting chemical changes with galvanic and electrolytic cells.
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