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Assertion (A) : Although the concentration of ozone is at most 12 parts per million(ppm), it is very effective at absorbing the harmful ultraviolet (UV) rays of the sun and protecting life on Earth. Reason (R) : Ozone is a molecule made of three oxygen atoms. The oxygen molecule we need to breathe contains two oxygen atoms. Codes

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Assertion (A) : Although the concentration of ozone is at most 12 parts per million(ppm), it is very effective at absorbing the harmful ultraviolet (UV) rays of the sun and protecting life on Earth. Reason (R) : Ozone is a molecule made of three oxygen atoms. The oxygen molecule we need to breathe contains two oxygen atoms. Codes






 
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