Multiple choice general knowledge science & technology

Which of the following is/are true about Ozone layer?

  1. Ozone layer is a concentration of ozone molecules up in the Stratosphere (10 to 50 kms)

  2. Ozone is produced only at the ground level and flows to high altitude to form Ozone layer

  3. In Stratosphere Ultraviolet rays break down oxygen molecules into atomic oxygen(O) which then combines with Oxygen molecule(O2) to form Ozone (O3)

  4. Around 90% of the Ozone in our atmosphere is contained in Troposphere only (within 10 kms)
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A,C Correct answer
Explanation

The ozone layer (90% of atmospheric ozone) is in the stratosphere (10-50 km), formed when UV radiation splits oxygen molecules into atomic oxygen which then combines with O2 to form O3. Ozone is NOT produced only at ground level, and 90% is NOT in the troposphere. This process is fundamental atmospheric chemistry.

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