Question

Ozone is present in the ____________ layer of atmosphere.

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

Answer 1

The correct option is B

Stratosphere

Explanation for the correct option:
(B) Stratosphere: Ozone is present in the stratosphere.

• The layer above the troposphere is at a distance between 10 to 50km above the earth’s surface.
• The stratosphere consists of the ozone layer which protects the earth from the UV (ultraviolet) rays of the sun.

Explanation for the incorrect options:
(A) Thermosphere:

• The layer above the mesosphere is at a distance between 80 to 320 km above the earth’s surface.
• Satellites and the international space station orbit the earth in this layer.

(C) Mesosphere:

• The layer above the stratosphere is at a distance between 50 to 80km above the earth’s surface.
• The mesosphere is very cold and burns most of the meteors preventing them from reaching out of the earth's surface.

(D) Troposphere

• The layer just above the earth’s surface whose distance is between 0 to 10km.
• The troposphere contains most of the air and oxygen which is important for all living organisms.
• Air is used for respiration and other functions for the survival of human beings and also forms the weather conditions of the earth.

Hence, option(B) is correct.