🏞️ BEVAE-181 Environmental Studies | IGNOU Important MCQs with Answers (Hindi & English)

🏞️ BEVAE - 181 is a foundational subject offered by IGNOU (Indira Gandhi National Open University) as part of its Ability Enhancement Courses (AECC). The course aims to develop awareness and understanding of environmental issues, sustainable development, conservation, biodiversity, and natural resource management.

This blog brings you the most important, repeated, and upcoming expected questions in the form of MCQs (Multiple Choice Questions) for your BEVAE-181 exam in 2025 — especially for students preparing in Hindi or English Medium.

✅ BEVAE-181: Most Important MCQs with Answers (Mixed Medium)

1. What is the percentage of water on Earth?

A) 60%
B) 50%
C) 71%
D) 90%
Answer: ✅ C) 71%

2. ओजोन परत का कार्य क्या है?

A) जलवायु बनाना
B) पराबैंगनी किरणों से सुरक्षा
C) ऑक्सीजन बनाना
D) CO₂ का निर्माण
उत्तर: ✅ B) पराबैंगनी किरणों से सुरक्षा

3. Which gas causes the greenhouse effect?

A) Oxygen
B) Methane
C) Nitrogen
D) Helium
Answer: ✅ B) Methane

4. विश्व पर्यावरण दिवस कब मनाया जाता है?

A) 5 मार्च
B) 5 जून
C) 22 अप्रैल
D) 15 अगस्त
उत्तर: ✅ B) 5 जून

5. Which of the following is a renewable resource?

A) Coal
B) Petrol
C) Wind Energy
D) Diesel
Answer: ✅ C) Wind Energy

6. भारत में वन्यजीव संरक्षण अधिनियम कब लागू हुआ?

A) 1970
B) 1972
C) 1980
D) 1985
उत्तर: ✅ B) 1972

7. The term ‘Ecosystem’ was coined by:

A) Charles Darwin
B) A.G. Tansley
C) Malthus
D) Newton
Answer: ✅ B) A.G. Tansley

8. जलवायु परिवर्तन का मुख्य कारण है:

A) वर्षा में वृद्धि
B) जीवाश्म ईंधन का प्रयोग
C) पौधारोपण
D) मानव जनसंख्या में कमी
उत्तर: ✅ B) जीवाश्म ईंधन का प्रयोग

9. What is the main source of fresh water on Earth?

A) Seas
B) Glaciers
C) Oceans
D) Rainwater only
Answer: ✅ B) Glaciers

10. Which one is a non-renewable energy source?

A) Sunlight
B) Biogas
C) Wind
D) Natural Gas
Answer: ✅ D) Natural Gas

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IGNOU 2025 Exam MCQs (All Units Covered)

🔹 Unit 1: Environment and Ecosystem

11. पर्यावरण का मुख्य घटक कौन है?
    A) मानव
    B) पशु
    C) जैविक और अजैविक घटक
    D) केवल मिट्टी
    उत्तर: ✅ C) जैविक और अजैविक घटक

12. What is the primary component of an ecosystem?
    Answer: ✅ Interaction between biotic and abiotic factors

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🔹 Unit 2: Natural Resources

13. Which is the main cause of resource depletion?
    Answer: ✅ Overpopulation and overuse

14. निम्न में से कौन अक्षय संसाधन नहीं है?
    A) सौर ऊर्जा
    B) जल ऊर्जा
    C) कोयला
    D) पवन ऊर्जा
    उत्तर: ✅ C) कोयला

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🔹 Unit 3: Biodiversity and Conservation

15. भारत में जैव विविधता हॉटस्पॉट कौन-कौन से हैं?
    A) हिमालय और पश्चिमी घाट
    उत्तर: ✅ A) हिमालय और पश्चिमी घाट

16. The term ‘Biodiversity’ was first used by:
    Answer: ✅ Walter G. Rosen

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🔹 Unit 4: Environmental Pollution

17. Which gas is mainly responsible for acid rain?
    Answer: ✅ Sulphur Dioxide (SO₂)

18. जल प्रदूषण को मापने के लिए कौन-सा पैरामीटर उपयोग होता है?
    उत्तर: ✅ बी.ओ.डी (Biological Oxygen Demand)

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🔹 Unit 5: Sustainable Development and Management

19. सतत विकास क्या है?
    उत्तर: ✅ वर्तमान आवश्यकताओं की पूर्ति बिना भविष्य की पीढ़ियों को नुकसान पहुँचाए

20. Sustainable development was first introduced in:
    Answer: ✅ Brundtland Report, 1987

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🧠 Bonus Set : Mixed Practice MCQs (21-50)

No.	Question	Answer
21	Noise pollution is measured in?	Decibels (dB)
22	Solid waste management includes?	Collection, treatment, disposal
23	जल चक्र में कौन महत्वपूर्ण भूमिका निभाता है?	सूर्य
24	Which layer contains the ozone layer?	Stratosphere
25	Which is a biodegradable waste?	Vegetable Peels
26	The main cause of soil erosion is?	Deforestation
27	Acid rain damages which monuments in India?	Taj Mahal
28	Which species is at risk of extinction?	Endangered
29	कार्बन डाइऑक्साइड का उत्सर्जन कम करने का तरीका?	पौधारोपण
30	Which energy is stored in biomass?	Chemical
31	What is the full form of BOD?	Biological Oxygen Demand
32	Which activity is eco-friendly?	Using solar energy
33	जनसंख्या वृद्धि का प्रभाव किस पर होता है?	संसाधनों पर
34	What is composting?	Making manure from waste
35	Which protocol controls CFCs?	Montreal Protocol
36	Vermicomposting uses?	Earthworms
37	Which one causes waterborne diseases?	Contaminated Water
38	What is global warming potential of CO₂?	1
39	What is the full form of NGO?	Non-Governmental Organization
40	Which is a primary air pollutant?	Carbon Monoxide
41	जल का प्रमुख उपयोग कहां होता है?	सिंचाई
42	Greenhouse gases trap which type of radiation?	Infrared
43	What is afforestation?	Planting trees
44	Deforestation causes?	Loss of biodiversity
45	How many biodiversity hotspots in India?	4
46	Which planet is called Green Planet?	Earth
47	Which of the following affects aquatic life?	Thermal Pollution
48	Clean India Mission launched in which year?	2014
49	Who is the father of ecology?	Ernst Haeckel
50	पर्यावरण दिवस की थीम 2024 क्या थी?	“Land restoration, desertification, and drought resilience”

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The BEVAE-181 Environmental Studies course is not just theoretical but directly related to your day-to-day life. These 50 questions cover basic concepts, expected exam patterns, and repeated questions, ensuring that you are fully prepared.