Ozone layer is found in

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Question

This question was previously asked in

REET 2011 Level - 1 (Hindi/English/Sanskrit) Official Paper

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Answer 1

The correct anwser is Stratosphere.

The atmosphere around the earth:

The atmosphere consists of different layers with varying densities and temperatures.
The column of the atmosphere is divided into five different layers depending upon the temperature condition.
They are troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

Key Points

Layers of atmosphere from bottom up:

Layer	Range	Feature
Troposphere	0 to 12 km	The lowest layer of Earth's atmosphere. The troposphere contains roughly 80% of the mass of Earth's atmosphere. It is the layer where most of Earth's weather takes place.
Stratosphere	12 to 50 km	It contains the ozone layer. Temperature Inversion (temperatures rise with increasing altitude) is seen in this layer. This rise in temperature is caused by the absorption of ultraviolet radiation (UV) radiation from the Sun by the ozone layer.
Mesosphere	50 to 80 km	It is the coldest place on Earth and has an average temperature of around −85 °C It is also the layer where most meteors burn up upon atmospheric entrance.
Thermosphere	80 to 700 km	The lower part of the thermosphere, from 80 to 550 kilometres above Earth's surface, contains the ionosphere. Ionosphere is used for Radio Communication. The temperature of the thermosphere gradually increases with height. The International Space Station orbits in this layer, between 350 and 420 km.
Exosphere	700 to 10,000 km	The outermost layer of Earth's atmosphere. It contains most of the satellites orbiting Earth.

Thus, the ozone layer is found in the earth's stratosphere layer.
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