Ozone is a rare gas found in the outer reaches of the atmosphere. Small quantities are sometimes produced by:
A
Electrical heaters
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B
Electric sparks of electric trains
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C
Heating rusted iron
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D
Melting ice from glaciers
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Solution
The correct option is C Electric sparks of electric trains Small quantities of Ozone is formed when electric sparks are produced (as in an electric train set) or sometimes when lightning strikes nearby. Ozone can also form from oxygen in the presence of ultraviolet light.