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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 sun.
It is used as a refrigerant and in fire-extinguishers.
It is formed by combining oxygen molecule with free oxygen atom.
MCQ
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Solution
It is used as a refrigerant and in fire-extinguishers.
Explanation:
Ozone (O) shields the Earth from UV radiation but is hazardous at ground level. It occurs when an oxygen molecule (O) combines with a free oxygen atom. However, it is not employed as a refrigerant or in fire extinguishers. Instead, CFCs are used.
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