BPSC CCE Prelims
Environment & Ecology Previous Year Questions (PYQs)
Solved Previous Year Questions (PYQs) for Environment & Ecology in BPSC CCE Prelims in English & Hindi Medium.
Chapter Breakdown: Scroll →
Renewable Energy means
- Electricity produced from solar
- Electricity produced from thermal plants
- Electricity produced from coal
- Electricity produced from wind
Choose the correct answer from the options given below:
Detailed Explanation:
✅ Statement 1 – Correct: Solar energy is a renewable source as sunlight is naturally replenished and inexhaustible on human timescales.
✅ Statement 4 – Correct: Wind energy is renewable because wind is generated continuously by atmospheric circulation and solar heating.
❌ Statement 2 – Incorrect: Thermal plants typically burn fossil fuels (coal, oil, natural gas) which are non-renewable resources.
❌ Statement 3 – Incorrect: Coal is a fossil fuel formed over millions of years and is non-renewable.
The species which are in danger of extinction are known as?
Detailed Explanation:
Endangered species are those facing very high risk of extinction in the near future due to factors like rapid population decline or habitat loss.
IUCN Red List categories classify species as: Vulnerable (lower risk), Endangered (high risk), Critically Endangered (extremely high risk), Extinct in the Wild, and Extinct (no longer existing).
Answer: Option 3 – Endangered
Which of the following is a major cause of air pollution?
Detailed Explanation:
Burning of fossil fuels (coal, petroleum, natural gas) in power plants, vehicles, and industries releases sulfur dioxide (SO₂), nitrogen oxides (NOₓ), carbon monoxide (CO), and particulate matter (PM2.5) directly into the atmosphere.
These pollutants are the primary cause of outdoor air pollution, leading to smog, respiratory diseases, and acid rain, while other options mainly affect soil, water, or indirectly impact air quality.
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Which gas contributes to global warming through its greenhouse effect?
Detailed Explanation:
Carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) are all greenhouse gases (GHGs) that trap heat in the atmosphere and contribute to global warming.
CO₂ is the most abundant anthropogenic GHG from fossil fuel combustion; methane has 25 times higher global warming potential (GWP) than CO₂ over 100 years and is released from agriculture and landfills; nitrous oxide has 298 times higher GWP than CO₂ and is emitted from agricultural soils and industrial processes.
Therefore, more than one of the above gases contribute to the greenhouse effect and global warming.
Which one of the following is the well-publicized wildlife campaign in the world launched in 1973?
Detailed Explanation:
Project Tiger was launched in 1973 by the Government of India and is the most well-publicized wildlife conservation campaign in the world.
Sunderbans Project and Lion Project (Gir) are important but were launched later and are not as globally recognized as Project Tiger, which became a model for wildlife conservation worldwide.
Which one of the following is the world's richest region from a marine biodiversity perspective, comprising 21 islands with estuaries, beaches, forests of the nearshore environment, seagrasses, coral reefs, salt marshes and mangroves?
Detailed Explanation:
Gulf of Mannar Biosphere Reserve is the world's richest marine biodiversity region in India, comprising 21 islands and featuring estuaries, beaches, nearshore forests, seagrasses, coral reefs, salt marshes and mangroves.
It is located between Tamil Nadu coast and Sri Lanka, recognized as a UNESCO Biosphere Reserve since 1989, and hosts over 4,000 species of flora and fauna including endangered dugongs and sea turtles.
Consider the following statements :
- In India, the Project Tiger was launched in 1973.
- The theme for International Biodiversity in 2022 is ‘Building a shared future for all life'.
- The Project Tiger is a tiger conservation programme.
Which of the above statements is/are correct?
Detailed Explanation:
All three statements about wildlife conservation initiatives are correct.
- Statement 1 is Correct: Project Tiger was launched in 1973 as a centrally sponsored scheme administered by the National Tiger Conservation Authority (NTCA).
- Statement 2 is Correct: The theme for International Day for Biological Diversity 2022 was 'Building a shared future for all life', celebrated on 22 May.
- Statement 3 is Correct: Project Tiger is indeed a tiger conservation programme following core-buffer area strategy in tiger reserves.
- Therefore, all three statements are correct, making Option 3 the correct answer.