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NDA 2018 GAT · General Knowledge · Ecology and Environment · medium

The ozone layer absorbs harmful ultraviolet radiation from the Sun. 2. The ozone layer is located mainly in the troposphere.

Single correct option

Consider the following statements:
1. The ozone layer absorbs harmful ultraviolet radiation from the Sun.
2. The ozone layer is located mainly in the troposphere.
Which of the statements is/are correct?
  1. A. 1 only
  2. B. 2 only
  3. C. Both 1 and 2
  4. D. Neither 1 nor 2
Show answer and solution

Answer: (A) 1 only

Ozone in the stratosphere absorbs most of the harmful UV-B and UV-C radiation, so statement 1 is correct. The concentrated ozone layer lies in the stratosphere, around 15 to 35 km above the Earth, not in the troposphere, so statement 2 is wrong. Ozone at ground level is a pollutant.
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Original question written in the NDA 2018 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake