Which one of the following statements with regard to ozone is not

Which one of the following statements with regard to ozone is not correct?

[amp_mcq option1=”Ozone is found mostly at 15-55 km in the atmosphere.” option2=”Ozone is produced by gaseous chemical reactions.” option3=”16th November is celebrated as the International Day for the Preservation of the Ozone Layer.” option4=”Ozone is a form of oxygen in which three oxygen atoms are bounded together.” correct=”option3″]

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UPSC CDS-2 – 2020

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The statement “16th November is celebrated as the International Day for the Preservation of the Ozone Layer” is not correct.

The International Day for the Preservation of the Ozone Layer is celebrated annually on September 16th. This date commemorates the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer in 1987.

The other statements are generally correct: Ozone is found predominantly in the stratosphere (the ozone layer), roughly between 10 km and 50 km altitude, with the highest concentration typically between 15 and 35 km, making the range 15-55 km acceptable. Ozone (O₃) is indeed a molecule formed by three oxygen atoms bonded together, and it is produced through photochemical reactions involving oxygen molecules and atoms in the atmosphere, particularly by UV radiation.

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