Question

Which of the following statements are correct?

1. Ozone layer lies between 10 and 50 km altitude.

2. Ozone absorbs ultraviolet radiation from the sun.

3. The mesosphere contains the highest concentration of ozone.

• A. 1 & 2
• B. 2 & 3
• C. 1 & 3
• D. All are correct

Answer 1

Answer:

A. 1 & 2

• Correct Answer: Option A) 1 & 2

• The ozone layer is a crucial component of Earth's atmosphere that protects life on our planet.

• Statement 1: Ozone layer lies between 10 and 50 km altitude - This is correct. The ozone layer is primarily located in the stratosphere, extending from approximately 10 to 50 kilometers above Earth's surface, with the highest concentration typically found between 20-25 km altitude.

• Statement 2: Ozone absorbs ultraviolet radiation from the sun - This is correct. This is the primary function of the ozone layer. Ozone molecules (O₃) absorb harmful ultraviolet-B (UV-B) and ultraviolet-C (UV-C) radiation from the sun, preventing most of it from reaching Earth's surface and protecting living organisms from DNA damage and other harmful effects.

• Statement 3: The mesosphere contains the highest concentration of ozone - This is incorrect. The mesosphere lies above the stratosphere (approximately 50-85 km altitude). The highest concentration of ozone is actually found in the stratosphere, not the mesosphere. The mesosphere has very low ozone concentrations.