UPSC Environment MCQs – 25 Important Questions for Prelims Practice

Environment and ecology have become highly important topics in the UPSC Civil Services Examination, particularly in the Prelims stage. In recent years, UPSC has consistently asked several questions from environmental issues such as biodiversity conservation, climate change, ecosystems, pollution, and international environmental agreements.

UPSC: Environment MCQs - 25 Questions

The environment section requires both conceptual clarity and awareness of current environmental developments. Aspirants must understand ecological principles such as food chains, ecosystems, and biodiversity along with environmental policies and global climate agreements.

Practicing multiple-choice questions (MCQs) is one of the best ways to prepare for this subject. MCQ practice helps aspirants strengthen their understanding of environmental concepts and improve accuracy in the exam. The following set of 25 Environment MCQs is designed to help candidates revise key topics frequently asked in UPSC examinations.

UPSC Environment MCQ Practice Set - 25 Questions

Ecology and Ecosystems

1. The term "ecosystem" refers to:

A. Only plants in a region
B. Interaction between living organisms and their environment
C. Only animal species in a region
D. Soil and minerals only

2. The process by which plants make food using sunlight is called:

A. Respiration
B. Photosynthesis
C. Decomposition
D. Fermentation

3. Which of the following is an example of a producer in an ecosystem?

A. Grass
B. Tiger
C. Deer
D. Bacteria

4. A food chain represents:

A. Energy flow in an ecosystem
B. Mineral formation
C. Soil erosion
D. Weather patterns

5. Which of the following organisms act as decomposers?

A. Fungi and bacteria
B. Tigers and lions
C. Birds and insects
D. Plants and algae

Biodiversity and Conservation

6. Biodiversity refers to:

A. Variety of plant species only
B. Variety of animal species only
C. Variety of living organisms in an area
D. Soil diversity

7. Which of the following is a biodiversity hotspot in India?

A. Western Ghats
B. Thar Desert
C. Indo-Gangetic Plain
D. Deccan Plateau

8. The project launched in India for the conservation of tigers is:

A. Project Elephant
B. Project Tiger
C. Project Rhino
D. Project Leopard

9. A national park is mainly established to:

A. Promote agriculture
B. Protect wildlife and ecosystems
C. Encourage tourism only
D. Promote industries

10. Which of the following is an endangered species in India?

A. Tiger
B. Cow
C. Goat
D. Dog

Climate Change and Pollution

11. Global warming is mainly caused by:

A. Increase in greenhouse gases
B. Ocean currents
C. Earth's rotation
D. Wind patterns

12. Which gas is the largest contributor to the greenhouse effect?

A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Helium

13. Acid rain is mainly caused by emissions of:

A. Nitrogen and oxygen
B. Sulfur dioxide and nitrogen oxides
C. Hydrogen and oxygen
D. Carbon monoxide only

14. The ozone layer protects the Earth from:

A. Visible light
B. Infrared radiation
C. Ultraviolet radiation
D. Radio waves

15. Which international agreement focuses on reducing greenhouse gas emissions?

A. Kyoto Protocol
B. Ramsar Convention
C. Basel Convention
D. Vienna Convention

Environmental Conventions and Policies

16. The Ramsar Convention is related to the conservation of:

A. Forests
B. Wetlands
C. Mountains
D. Oceans

17. The Convention on Biological Diversity was adopted in:

A. 1992
B. 1987
C. 1972
D. 2005

18. The Paris Agreement aims to limit global warming to:

A. 5°C
B. 3°C
C. Below 2°C
D. 10°C

19. The Montreal Protocol deals with:

A. Climate change
B. Ozone layer protection
C. Biodiversity conservation
D. Marine pollution

20. Which organization leads global environmental efforts under the United Nations?

A. UNESCO
B. UNEP
C. WHO
D. FAO

Miscellaneous Environment Questions

21. Mangrove forests are mainly found in:

A. Mountains
B. Coastal areas
C. Deserts
D. Grasslands

22. The Sundarbans are famous for:

A. Coral reefs
B. Mangrove forests
C. Desert vegetation
D. Mountain forests

23. Which of the following is a renewable resource?

A. Coal
B. Petroleum
C. Solar energy
D. Natural gas

24. Which of the following animals is protected under Project Elephant?

A. Asian Elephant
B. African Elephant
C. Blue Whale
D. Giant Panda

25. Deforestation mainly leads to:

A. Increased biodiversity
B. Soil erosion and climate change
C. Decrease in temperature
D. Increase in rainfall

Answer Key

Conclusion

Environment MCQ practice plays a vital role in UPSC preparation because the subject is both conceptual and current affairs oriented. Regularly solving practice questions helps aspirants improve conceptual clarity, strengthen memory, and develop effective elimination techniques.

By combining conceptual understanding with consistent MCQ practice and awareness of environmental developments, candidates can significantly improve their performance in the UPSC Civil Services Examination.