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Environment and Ecology Mixed Practice — MCQs with Answers (Set 32)

A mixed set of 25 Environment and Ecology MCQs on smaller topics that have no set of their own. Each answer links to its topic Article.

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Q1. Which Indian region holds the richest coral diversity, with 177 recorded coral species?

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Answer: D

The Andaman and Nicobar Islands hold India’s richest coral diversity, with 177 recorded coral species.

Related topics: Coral Reefs and Marine Biodiversity Conservation in India: Four Reef Zones

Q2. In which year did the Gulf of Mannar become India’s first Marine Biosphere Reserve?

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Answer: B

The Gulf of Mannar became India’s first Marine Biosphere Reserve in 1989, holding coral reefs, seagrass beds and mangroves together.

Related topics: Coral Reefs and Marine Biodiversity Conservation in India: Four Reef Zones

Q3. Which of these is one of India’s four major coral reef regions?

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Answer: C

India’s four major coral reef regions are the Gulf of Kutch, the Gulf of Mannar, Lakshadweep, and the Andaman and Nicobar Islands.

Related topics: Coral Reefs and Marine Biodiversity Conservation in India: Four Reef Zones

Q4. On 19 February 2024, what did the Supreme Court order regarding the Forest (Conservation) Amendment Act, 2023?

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Answer: C

The Court ordered states and UTs to keep applying the broad 1996 T.N. Godavarman definition of “forest,” until fresh forest records are compiled.

Related topics: Forest (Conservation) Amendment Act, 2023

Q5. Which of the following is a genuine exemption added by the Forest (Conservation) Amendment Act, 2023?

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Answer: B

The Act exempts strategic linear projects within 100 km of India’s international border, the LAC, or the LoC, for national security purposes.

Related topics: Forest (Conservation) Amendment Act, 2023

Q6. When did the Lok Sabha and Rajya Sabha pass the Forest (Conservation) Amendment Bill, 2023?

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Answer: A

The Lok Sabha passed the bill on 26 July 2023, and the Rajya Sabha on 2 August 2023. 20 October 2023 and 19 February 2024 are actually Supreme Court dates — when it issued notice on a legal challenge, and when it passed its Godavarman interim order.

Related topics: Forest (Conservation) Amendment Act, 2023

Q7. The proviso to section 1A(1)(b) of the Forest (Conservation) Act, as amended in 2023, leaves out land changed from forest to non-forest use by a competent authority on or before which date?

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Answer: D

The date in the proviso is 12 December 1996. It is statutory text. The date echoes the Supreme Court’s Godavarman order of the same day, which is a judicial direction. The proviso covers only land converted by an authority of the State or Union Territory by that date. It does not exempt every earlier encroachment or all notified forest.

Related topics: Forest (Conservation) Amendment Act, 2023

Q8. What is the Forest (Conservation) Amendment Act, 2023’s new Hindi name for the 1980 law?

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Answer: C

The 1980 Act was renamed the Van (Sanrakshan Evam Samvardhan) Adhiniyam, or “Forest (Conservation and Augmentation) Act.”

Related topics: Forest (Conservation) Amendment Act, 2023

Q9. The concept of ‘carbon credit’ as a market-based emissions-reduction tool originated from which agreement?

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Answer: A

The 1997 Kyoto Protocol introduced tradeable carbon credits as a mechanism to cut greenhouse gas emissions.

Related topics: Outsourcing and Carbon-Credit Trading

Q10. The ‘Baku to Belém Roadmap’ aims to scale total climate finance to developing countries to what level, by what year?

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Answer: A

The correct answer is at least USD 1.3 trillion a year, by 2035. Paragraph 7 of the draft COP29 finance text (L.22) calls for scaling up financing to developing countries to at least USD 1.3 trillion per year by 2035, from all public and private sources. The CMA 6 session report records decision 1/CMA.6 as adopted. We read the paragraph wording from the draft and did not compare it with the final text. The Baku to Belem Roadmap is the report by the COP29 and COP30 Presidencies on how to reach the goal. The USD 300 billion goal in paragraph 8 of the draft is a separate goal. Developed country Parties take the lead, and the money comes from public and private sources. It is not a public-finance floor. The older USD 100 billion goal was for 2020, not 2030.

Related topics: Green Climate Fund and Global Climate Finance

Q11. Where and when was COP30 held, and what did it produce?

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Answer: A

COP30 was held in Belém, Brazil, from 10-21 November 2025, where all 195 Parties adopted the ‘Belém Package’ of 29 decisions.

Related topics: Global Opinions and Response to Climate Change

Q12. At COP30, India spoke on behalf of the BASIC and Like-Minded Developing Countries groups, demanding developed nations honour which Paris Agreement provision?

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Answer: B

India demanded developed nations honour Article 9.1 of the Paris Agreement, their legal obligation to provide climate finance to developing countries.

Related topics: Global Opinions and Response to Climate Change

Q13. Per Pew Research’s 2025 global survey, in how many surveyed countries do majorities NOT see climate change as a major threat?

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Answer: A

Majorities in all but three countries — Israel, Nigeria, and the US — see climate change as a major threat, per Pew’s 2025 survey.

Related topics: Global Opinions and Response to Climate Change

Q14. Roughly how much plastic waste does India generate domestically every year, and when did its latest pesticide ban-list revision take effect?

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Answer: A

India generates about 4.13 million tonnes of plastic waste annually, and its latest pesticide ban-list revision took effect on 31 March 2024.

Related topics: Chemical Threats to Biodiversity

Q15. Which class of pesticides is specifically linked to declining bee and butterfly populations in India?

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Answer: B

Neonicotinoids are linked to declining bee and butterfly populations in India, weakening pollination and crop yields.

Related topics: Chemical Threats to Biodiversity

Q16. What is the process called in which a chemical’s concentration builds up as it moves up the food chain?

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Answer: C

Biomagnification is the process by which chemical concentrations increase as they move up the food chain, from plankton to fish to larger predators.

Related topics: Chemical Threats to Biodiversity

Q17. In 2024, roughly how many tonnes of microplastics was India projected to release into waterbodies, and where did that rank globally?

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Answer: A

India was projected to release about 391,879 tonnes of microplastics in 2024, second only to China’s 787,069 tonnes.

Related topics: Chemical Threats to Biodiversity

Q18. Between 2019-20 and 2023-24, what share of its compensatory afforestation target did India achieve, and against what target area?

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Answer: A

The Tribune, running a PTI report on the Central Empowered Committee report, gives 1,78,261 hectares against 2,09,297 hectares. That is about 85 per cent for 2019-20 to 2023-24.

Related topics: CAMPA: What the Compensatory Afforestation Fund Act Actually Requires

Q19. In 2024-25, how much e-waste did India generate, and roughly what share of it was recycled?

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Answer: A

India generated 13.97 lakh tonnes of e-waste in 2024-25, of which 11.59 lakh tonnes (about 83%) were recycled.

Related topics: Solid and Hazardous Waste

Q20. What did the Solid Waste Management Rules of 2016 make mandatory for the first time?

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Answer: B

The 2016 rules replaced the 2000 rules and made source segregation mandatory, into biodegradable, dry, and domestic hazardous waste.

Related topics: Solid and Hazardous Waste

Q21. Roughly how much municipal solid waste does India generate every day?

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Answer: B

India generates about 170,000 tonnes of municipal solid waste daily, of which 92% is collected but only 54% is scientifically treated.

Related topics: Solid and Hazardous Waste

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