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Question
The incorrect statement about ozone is:
Options
It is a deadly poisonous gas.
It shields the surface of the earth from UV radiation from the sun.
It is used as a refrigerant and in fire extinguishers.
It is formed by combining an oxygen molecule with a free oxygen atom.
MCQ
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Solution
It is used as a refrigerant and in fire extinguishers.
Explanation:
Ozone (O3) shields the earth from UV radiation but is hazardous at ground level. It occurs when an oxygen molecule (O2) combines with a free oxygen atom (O). However, it is not employed as a refrigerant or in fire extinguishers. Instead, CFCs are used.
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