Question

Ozone layer is present in atmosphere in:

• A. Troposphere
• B. Stratosphere
• C. Mesosphere
• D. Thermosphere

Answer 1

The correct option is B

Stratosphere

The correct option is B: Stratosphere

The explanation for the correct answer:

1. Ozone is a highly reactive gas that is made of three oxygen atoms and is found in the upper Stratosphere, which is about 15–30 kilometers above the Earth’s surface.
2. The formation of the ozone layer occurs in the stratosphere which absorbs the harmful ultraviolet rays coming from the sun.

The explanation for incorrect answer:

Option A: Troposphere

1. It is the basal part that extends about 20km above the earth’s surface.
2. In this region, all the climatic events occur such as cloud formation, lightning, thunder Storm.

Option C: Mesosphere:

1. It lies next to the stratosphere and 40 km above the earth's surface.
2. The Temperature in this zone decreases.

Option D: Thermosphere

1. It lies above the Mesosphere and below the exosphere and extends about 90km from the Earth's surface.
2. In this region, the UV rays from the sun originate.

Final answer: The correct answer is option (B)