Environment & Ecology question from JKAS Prelims, 2018 by JKPSC
Out of following, which of the altitudes in the‘ atmosphere would have the maximum concentration of Ozone?
Last updated May 15, 2026
Correct Answer:
Option C —
25 t0 30km
While ozone is present throughout the stratosphere, its highest concentration (the "Ozone Layer") is typically found between 20 km and 35 km above the Earth's surface. In the context of the options provided, 25 to 30 km represents the peak density of this gas.
The Stratosphere (The Home of "Good" Ozone): About 90% of the Earth's ozone is found here. It acts as a biological shield by absorbing harmful Ultraviolet (UV-B and UV-C) radiation from the sun. Without this layer, life on Earth would face high rates of skin cancer, cataracts, and damaged ecosystems.
The Troposphere (The Home of "Bad" Ozone): The remaining 10% of ozone is found near the ground. Here, it is considered a pollutant and a key component of photochemical smog, formed by the reaction of sunlight with Nitrogen Oxides (NO_x) and Volatile Organic Compounds (VOCs).
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.
