OPSC OCS 2019 · Question 34 of 99
General Studies
stratosphere Most ozone (about 90%) is found in the stratosphere , which begins about 10–16 kilometers (6–10 miles) above Earth's surface and extends up to about 50 kilometers (31 miles) altitude. The stratospheric region with the highest ozone concentration is commonly known as…
Source: OPSC OCS Prelims 2019 GS Paper-I; answers per hemunda.com unofficial key
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