UPSC CSE · Subject
UPSC Prelims Environment and Ecology PYQs (2011–2026): Topic-wise with Answers – Page 2
283 UPSC Prelims questions on Environment and Ecology from 2011–2026, grouped by topic with the newest year first. The most-asked topics are Climate Change (43), Biodiversity (41), Pollution (40). Difficulty: 18% easy, 53% medium and 29% hard.
Biodiversity 24 questions
- Economics Ecosystems Biodiversity TEEBWith reference to an initiative called ‘The Economics of Ecosystems and Biodiversity’ (TEEB), which of the following statements is/are correct?
- Mixed Forests Andaman NicobarWhich one of the following regions of India has a combination of mangrove forest, evergreen forest and deciduous forest?
- Genetic Engineering Appraisal CommitteeThe Genetic Engineering Appraisal Committee is constituted under the
- Birdlife InternationalWith reference to an organization known as 'BirdLife International', which of the following statements is/are correct?
- Neem Oil Pesticide UsesWith reference to Neem tree, consider the following statements:
- Arachnid vs CrustaceanAmong the following organisms, which one does not belong to the class of other three?
- Ganges River Dolphin DeclineOther than poaching, what are the possible reasons for the decline in the population of Ganges River Dolphins?
- Hibernation Bats Bears RodentsConsider the following:
- Birds Following Grazing CattleIf you walk through the countryside, you are likely to see some birds stalking alongside the cattle to seize the insects disturbed by their movement through grasses.…
- Coral Reefs IndiaWhich of the following have coral reefs?
- Biosphere ReservesThe most important strategy for the conservation of biodiversity together with traditional human life is the establishment of
- Equatorial Forest FeaturesWhich of the following are characteristic features of equatorial forests?
- Desert Plant AdaptationsWhich of the following leaf modifications occurs/occur in desert areas to inhibit water loss?
- Star Tortoise Pygmy HogConsider the following:
- Sea Cow MammalsConsider the following animals:
- National Biodiversity AuthorityHow does National Biodiversity Authority (NBA) help in protecting the Indian Agriculture?
- Pollinating AgentsConsider the following kinds of organisms:
- Biodiversity ThreatsWhich of the following can be threats to the biodiversity of a geographical area?
- Red Data BooksThe ‘Red Data Books’ published by the International Union for Conservation of Nature and Natural Resources (IUCN) contain lists of
- Biodiversity Latitudinal GradientConsider the following statements:
- Biodiversity Ecosystem ServicesBiodiversity forms the basis for human existence in the following ways:
- In Situ Conservation SitesWhich one of the following is not a site for in-situ method of conservation of flora?
- Biodiversity Hotspot CriteriaThree of the following criteria have contributed to the recognition of Western Ghats-Sri Lanka and Indo-Burma regions as hotspots of biodiversity:
- Himalayas Species DiversityThe Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?
Pollution 36 questions
- Plastic in Everyday ItemsConsider the following:
- Activated Carbon Effluent TreatmentConsider the following statements:
- Cement Industry CO2 EmissionsConsider the following statements:
- Cloud Seeding PollutionArtificial way of causing rainfall to reduce air pollution makes use of
- Sulphur Dioxide SourcesAccording to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions?
- Chewing Gum PollutionConsider the following statements:
- PFAS Forever ChemicalsWith reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements:
- Hydrofluorocarbons Aerosols Foam AgentsConsider the following:
- Mercury PollutionConsider the following statements regarding mercury pollution:
- WHO Air Quality GuidelinesIn the context of WHO Air Quality Guidelines, consider the following statements:
- PET PlasticWith reference to polythylene terephthalate, the use of which is so widespread in our daily lives, consider the following statements:
- Acid Rain CausesConsider the following:
- R2 Code Electronics RecyclingR2 Code of Practices' constitutes a tool available for promoting the adoption of:
- Copper Smelting ConcernsWhy is there a concern about copper smelting plants?
- Furnace OilWith reference to furnace oil, consider the following statements:
- Magnetite PollutionMagnetite particles, suspected to cause neurodegenerative problems, are generated as environmental pollutants from which of the following?
- Benzene Pollution SourcesWhich of the following are the reasons/factors for exposure to benzene pollution?
- Steel Slag UsesSteel slag can be the material for which of the following?
- Coal Ash and EmissionsConsider the following statements:
- Pyrolysis Plasma GasificationIn the context of which one of the following are the terms 'pyrolysis and plasma gasification' mentioned?
- Microbeads PollutionWhy is there a great concern about the 'microbeads' that are released into environment?
- Nitrogen Emissions AgricultureConsider the following statements:
- Hydrogen CNG FuelIn the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements:
- Crop Residue Burning EmissionsConsider the following:
- River Sand Mining ConsequencesWhich of the following is/are the possible consequence of heavy sand mining in river beds?
- Bioremediation AdvantagesIn the context of solving pollution problems, what is/are the advantage/advantages of bioremediation technique?
- Air Quality Index GasesIn the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index?
- Nitrogenous Fertilizer ImpactsWhat can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture?
- Fly Ash Bricks CementWith reference to fly ash produced by the power plants using coal as fuel, which of the following statements is/are correct?
- Steel Industry PollutantsWhich of the following are some important pollutants released by steel industry in India?
- Nanoparticles ConcernsThere is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why?
- Brominated Flame RetardantsBrominated flame retardants are used in many household products like mattresses and upholstery. Why is there some concern about their use?
- Arsenic Fluoride Uranium GroundwaterWhich of the following can be found as pollutants in the drinking water in some parts of India?
- Freshwater DistributionOn the planet Earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion:
- E Waste PollutantsDue to improper/indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste?
- Acid Rain CausesAcid rain is caused by the pollution of environment by: