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Ayushree
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Asked: 2025-09-26T11:31:52+00:00 In:

The incorrect statement about ozone is:

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Poll Results

0%[A] It is a deadly poisonous gas
0%[B] It shields the surface of the earth from UV radiation from the sun.
100%[C] It is used as a refrigerant and in fire extinguishers. ( 1 voter )
0%[D] It is formed by combining oxygen molecules with free oxygen atom.
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The correct answer is [C] It is used as a refrigerant and in fire extinguishers.
That statement is incorrect because ozone is not used as a refrigerant or in fire extinguishers. Instead, CFCs are used as refrigerants and are harmful to ozone.

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cbse class 10 science half yearly sample papersclass 10 science half yearly 2025incorrect statement about ozone
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    1 Answer

    1. ANSWER: [C]

      Explanation: The correct answer is [C] It is used as a refrigerant and in fire extinguishers.

      Ozone is poisonous at ground level.

      Ozone layer protects from harmful UV rays.

      Ozone forms when O₂ combines with free O atom (O₃).

      Refrigerants/fire extinguishers use CFCs, not ozone.

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