Environment & Ecology PYQs

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1. Prelims 2025Q44Environmental Pollution

   Consider the following :

   I.Cigarette butts

   II.Eyeglass lenses

   III.Car tyres

   How many of them contain plastic?

   aOnly onebOnly twocAll the threedNone
2. Prelims 2025Q50Environmental Pollution

   Consider the following statements :

   Statement I :

   Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries.

   Statement II :

   Activated carbon exhibits a large surface area and a strong potential for adsorbing heavy metals.

   Statement III :

   Activated carbon can be easily synthesized from environmental wastes with high carbon content.

   Which one of the following is correct in respect of the above statements?

   aBoth Statement II and Statement III are correct and both of them explain Statement IbBoth Statement II and Statement III are correct but only one of them explains Statement IcOnly one of the Statements II and III is correct and that explains Statement IdNeither Statement II nor Statement III is correct
3. Prelims 2025Q64Climate ChangeAnswer disputed

   The World Bank warned that India could become one of the first places where wet-bulb temperatures routinely exceed 35 ºC. Which of the following statements best reflect(s) the implication of the above-said report?

   I.Peninsular India will most likely suffer from flooding, tropical cyclones and droughts.

   II.The survival of animals including humans will be affected as shedding of their body heat through perspiration becomes difficult.

   Select the correct answer using the code given below.

   aI onlybII onlycBoth I and IIdNeither I nor II
4. Prelims 2025Q70Renewable Energy

   Consider the following statements about 'PM Surya Ghar Muft Bijli Yojana' :

   I.It targets installation of one crore solar rooftop panels in the residential sector.

   II.The Ministry of New and Renewable Energy aims to impart training on installation, operation, maintenance and repairs of solar rooftop systems at grassroot levels.

   III.It aims to create more than three lakhs skilled manpower through fresh skilling, and up-skilling, under scheme component of capacity building.

   Which of the statements given above are correct?

   aI and II onlybI and III onlycII and III onlydI, II and III
5. Prelims 2025Q90International Conventions & Organisations

   Which organization has enacted the Nature Restoration Law (NRL) to tackle climate change and biodiversity loss?

   aThe European UnionbThe World BankcThe Organization for Economic Cooperation and DevelopmentdThe Food and Agriculture Organization
6. Prelims 2024Q16Ecology & Ecosystems

   One of the following regions has the world’s largest tropical peatland, which holds about three years worth of global carbon emissions from fossil fuels; and the possible destruction of which can exert detrimental effect on the global climate. Which one of the following denotes that region ?

   aAmazon BasinbCongo BasincKikori BasindRio de la Plata Basin
7. Prelims 2024Q17Environmental Pollution

   With reference to perfluoroalkyl and polyfluoroalkyl substances (PFAS) that are used in making many consumer products, consider the following statements :

   1.PFAS are found to be widespread in drinking water, food and food packaging materials.

   2.PFAS are not easily degraded in the environment.

   3.Persistent exposure to PFAS can lead to bioaccumulation in animal bodies.

   Which of the statements given above are correct ?

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
8. Prelims 2024Q18Biodiversity & Species

   Consider the following :

   1.Carabid beetles

   2.Centipedes

   3.Flies

   4.Termites

   5.Wasps Parasitoid species are found in how many of the above kind of organisms ?

   aOnly twobOnly threecOnly fourdAll five
9. Prelims 2024Q21Biodiversity & Species

   The organisms "Cicada, Froghopper and Pond skater" are :

   aBirdsbFishcInsectsdReptiles
10. Prelims 2024Q22Environmental Pollution

    Consider the following statements :

    Statement-I :

    Many chewing gums found in the market are considered a source of environmental pollution.

    Statement-II :

    Many chewing gums contain plastic as gum base.

    Which one of the following is correct in respect of the above statements ?

    aBoth Statement-I and Statement-II are correct and Statement-II explains Statement-IbBoth Statement-I and Statement-II are correct, but Statement-II does not explain Statement-IcStatement-I is correct, but Statement-II is incorrectdStatement-I is incorrect, but Statement-II is correct
11. Prelims 2024Q23Biodiversity & Species

    Consider the following pairs :

    Country — Animal found in its natural habitat

    1.Brazil — Indri

    2.Indonesia — Elk

    3.Madagascar — Bonobo

    How many of the pairs given above are correctly matched ?

    aOnly onebOnly twocAll threedNone
12. Prelims 2024Q25Biodiversity & Species

    Consider the following statements :

    1.Lions do not have a particular breeding season.

    2.Unlike most other big cats, cheetahs do not roar.

    3.Unlike male lions, male leopards do not proclaim their territory by scent marking.

    Which of the statements given above are correct ?

    a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
13. Prelims 2024Q26Sustainable Agriculture & Development

    Which one of the following is the correct description of "100 Million Farmers" ?

    aIt is a platform for accelerating the transition towards food and water systems that are net-zero (carbon), nature-positive and that aims to increase farmer resilience.bIt is an international alliance and a network of individuals and farming organisations interested in supporting and strengthening the development of the organic animal husbandry.cIt is a digital platform fully integrated with service providers and built on blockchain that lets buyers, sellers and third parties trade fertilizers quickly and securely.dIt is a platform with the mission of encouraging the farmers to form Farmer Product Organisations or Agribusiness Consortiums, thus facilitating the access to global open markets to sell their products.
14. Prelims 2024Q27Renewable Energy

    Consider the following :

    1.Battery storage

    2.Biomass generators

    3.Fuel cells

    4.Rooftop solar photovoltaic units

    How many of the above are considered "Distributed Energy Resources" ?

    aOnly onebOnly twocOnly threedAll four
15. Prelims 2024Q28Ecology & Ecosystems

    Which one of the following shows a unique relationship with an insect that has coevolved with it and that is the only insect that can pollinate this tree ?

    aFigbMahuacSandalwooddSilk cotton
16. Prelims 2024Q29Biodiversity & Species

    Consider the following :

    1.Butterflies

    2.Fish

    3.Frogs

    How many of the above have poisonous species among them ?

    aOnly onebOnly twocAll threedNone
17. Prelims 2024Q30Biodiversity & Species

    Consider the following :

    1.Cashew

    2.Papaya

    3.Red sanders

    How many of the above trees are actually native to India ?

    aOnly onebOnly twocAll threedNone
18. Prelims 2024Q38Renewable Energy

    Recently, the term "pumped-storage hydropower" is actually and appropriately discussed in the context of which one of the following ?

    aIrrigation of terraced crop fieldsbLift irrigation of cereal cropscLong duration energy storagedRainwater harvesting system
19. Prelims 2024Q39Environmental Pollution

    "Membrane Bioreactors" are often discussed in the context of :

    aAssisted reproductive technologiesbDrug delivery nanotechnologiescVaccine production technologiesdWastewater treatment technologies
20. Prelims 2024Q46Renewable Energy

    Consider the following materials :

    1.Agricultural residues

    2.Corn grain

    3.Wastewater treatment sludge

    4.Wood mill waste

    Which of the above can be used as feedstock for producing Sustainable Aviation Fuel ?

    a1 and 2 onlyb3 and 4 onlyc1, 2, 3 and 4d1, 3 and 4 only