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1. What is the primary component of the ozone layer?

a) Nitrogen

b) Oxygen

c) Carbon dioxide

d) Methane

2. What is the main source of ozone depletion?

a) Natural processes

b) Human activities, such as the release of chlorine and bromine compounds

c) Solar radiation

d) Volcanic eruptions

3. What is the name of the hole in the ozone layer over Antarctica?

a) Antarctic Ozone Hole

b) Arctic Ozone Hole

c) Tropical Ozone Hole

d) Equatorial Ozone Hole

4. At what altitude is the majority of the ozone layer located?

a) Near the Earth's surface

b) At the top of the troposphere

c) In the stratosphere

d) In the mesosphere

5. What is the chemical formula for ozone?

a) O2

b) CO2

c) N2

d) O3

6. Which of the following is not a consequence of ozone depletion?

a) Increased ultraviolet radiation reaching the Earth's surface

b) Decreased air pollution

c) Reduced crop yields

d) Increased skin cancer rates

7. What is the name of the treaty signed in 1987 to phase out ozone depleting substances?

a) The Clean Air Act

b) The Montreal Protocol

c) The Paris Agreement

d) The Kyoto Protocol

8. Which of the following is not an ozone depleting substance?

a) Chlorofluorocarbons (CFCs)

b) Hydrochlorofluorocarbons (HCFCs)

c) Hydrofluorocarbons (HFCs)

d) Carbon dioxide (CO2)

9. How does the ozone layer protect life on Earth?

a) By absorbing ultraviolet radiation

b) By releasing oxygen

c) By reflecting visible light

d) By trapping heat

10. What is the current status of the ozone layer?

a) It is still depleting at a rapid rate

b) It is recovering slowly but steadily

c) It has fully recovered and is no longer a concern

d) It is stable and not changing.

Answers:

1-d

2-b

3-a

4-c

5-d

6-b

7-b

8-d

9-a

10-b

  1. Urea
  2. Quartz Glass
  3. Esters
  4. Mixtures

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Multiple Choice Questions (MCQs)

The UPSC (Union Public Service Commission) Prelims exam is the first step in the selection process for the Indian Administrative Service (IAS), Indian Foreign Service (IFS), and Indian Police Service (IPS) among other civil services in India. The exam consists of two papers: General Studies Paper 1 and General Studies Paper 2 (also known as the Civil Services Aptitude Test or CSAT). The General Studies Paper 1 is worth 200 marks and is comprised of multiple choice questions (MCQs). The exam tests the candidate's knowledge of current events, Indian and World history, Indian and World geography, Indian polity and governance, economic and social development, general science and environmental ecology and biodiversity.

The UPSC Prelims exam is a highly competitive exam and it is important for candidates to have a thorough understanding of the syllabus and to practice as many MCQs as possible to increase their chances of success.

You will have to answer all the questions within a limited time frame. So practice time management techniques and use a timer while solving mock tests.

The questions are designed to test the candidate's understanding of the subject matter and their ability to apply that knowledge in a practical context. So, MCQs on this website are prepared in that direction to make you conceptually strong.

The MCQs in UPSC Prelims are generally of the following types:

  1. Factual: These questions test the candidate's knowledge of basic facts, figures, and dates.
  2. Conceptual: These questions test the candidate's understanding of concepts and principles.
  3. Analytical: These questions test the candidate's ability to analyze and interpret information.
  4. Applied: These questions test the candidate's ability to apply their knowledge to practical situations.
  5. Current events: These questions test the candidate's knowledge of recent events and happenings.