Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q86 (CDS-I/2006) Geography › World Physical Geography › Atmosphere composition Answer Verified

Which one of the following statements is correct ? Ozone is found in the Earth’s atmosphere mostly between ,

Result
Your answer: —  ·  Correct: C
Explanation

Ozone (O3) is a trace gas primarily located in the stratosphere, the atmospheric layer extending from approximately 10-15 km up to 50 km [t1, t6]. While ozone is present throughout the atmosphere, about 90% of it resides in the stratosphere [t3, t4]. Scientific sources and textbooks specify that the highest concentration of ozone, often referred to as the 'ozone layer' or 'ozonosphere', is found between 20 km and 50 km [c3, c5]. Specifically, the most intense concentration typically occurs between 20 km and 30-35 km [c1, c2, t2]. This layer plays a vital role in shielding the Earth by absorbing harmful ultraviolet (UV) radiation [c4, t8]. Because the majority of the ozone mass and its peak concentrations are contained within the 20 to 50 km range, option 3 is the most accurate description of where ozone is mostly found.

Sources

  1. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Ozone (O3) > p. 272
  2. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 20: Earths Atmosphere > Ozonosphere > p. 276
  3. [3] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 6: Environmental Degradation and Management > ozone depletion > p. 11
  4. [4] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 1: BASIC CONCEPTS OF ENVIRONMENT AND ECOLOGY > Dirunion of Atmosphere > p. 7
  5. [5] https://csl.noaa.gov/assessments/ozone/2022/downloads/twentyquestions/Q1.pdf
  6. [6] https://ozone.unep.org/20-questions-and-answers
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
56%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

CDS-II · 2020 · Q36 Relevance score: 7.37

Which one of the following statements with regard to ozone is NOT correct?

CDS-I · 2012 · Q80 Relevance score: 5.90

Consider the following state- ments : 1. Ozone is mostly found in the stratosphere. 2. Ozone layer lies 55-75 km above the surface of the Earth. 3. Ozone absorbs ultraviolet radiation from the Sun. 4. Ozone layer has no significance for life on the Earth. Which of the statements given above are correct ?

CDS-II · 2011 · Q13 Relevance score: 4.78

Which of the following statements regarding ozone layer within the atmos- phere is/are correct ? 1. It absorbs most of the ultraviolet radiation found in the Sun’s rays. 2. Chlorofluorocarbons are serious threat to the ozone layer. Select the correct answer using the code given below :

CDS-II · 2016 · Q33 Relevance score: 4.07

Which of the following statements concerning atmosphere of the Earth are correct? 1. In stratosphere, temperature increases with altitude. 2. In mesosphere, temperature decreases with altitude. 3. The lowest temperature of the atmosphere is recorded in the upper part of mesosphere. 4. Tropopause is an isothermal zone. Select the correct answer using the code given below.

NDA-II · 2016 · Q2 Relevance score: 3.99

Statement 1 : Ozone is a tn-atomic molecule of oxygen. Statement II ; Ozone is concentrated mainly in stratosphere.