PYQ Browser
4392 Previous Year Questions • 2016–2026 • Prelims, Mains, Essay, Optionals
Topic:[Prelims] General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization.229 PYQs
Clear Topic Filter ✕All Exams
Year
Mains - GS-IV
1 shownPrelims - Paper 1 (GS)
19 shown2026•Prelims•Paper 1 (GS)•Q.21
Consider the following statements with reference to India's response to climate change: I. India's Long-Term Low Emission Development Strategy (LT-LEDS) is a crucial tool for achieving net-zero emissions by 2070. II. India's 4th Biennial Update Report (BUR-4) submitted in December, 2024 recorded around 8% decrease in Greenhouse gas emissions in 2020 over 2019. III. Climate-resilient development necessarily depends on quick and short-term achievement of emission reduction targets. Which of the following relationships among the above statements is/are correct?
1
Statement I is empirically supported by statement II.
2
Statement III contradicts the approach implicit in statement I.
3
Statement I and statement III together establish the premise of long-term sustainability.
Climate Change Policy
2026•Prelims•Paper 1 (GS)•Q.22
With respect to the Western Hoolock Gibbons, which of the following statements is/are correct?
1
A Sanctuary in North-east India is home to this ape species listed as Endangered in the International Union for Conservation of Nature (IUCN) Red List.
2
They have specialized brachiation and can easily swing between trees.
3
They possess a strong and heavy build like gorillas, yet are remarkably agile tree climbers.
Biodiversity and Conservation
2026•Prelims•Paper 1 (GS)•Q.23
Which of the following best explain(s) the rationale for protecting mangrove ecosystems in the context of climate resilience?
1
Mangroves reduce tidal energy and store freshwater, making them ideal sites for paddy cultivation in saline estuarine belts.
2
Their salt-sensitive roots filter seawater, making mangroves key to converting coastal land into freshwater aquaculture zones.
3
By withstanding tidal surges and offering biomass resources, mangroves function both as natural bio-shields and livelihood bases for rural communities.
Mangrove Ecosystems and Climate Resilience
2026•Prelims•Paper 1 (GS)•Q.27
Which of the following statements with regard to the arrival of Amur Falcons at Doyang Lake in Nagaland each year from Mongolia is/are correct?
1
It showcases how sustained local conservation efforts can contribute to the arrival and protection of international migratory birds.
2
It reflects the global success of advanced tracking technologies that guide migratory birds back to their stopover sites.
3
It confirms that Amur Falcons have adapted to permanent residency in India due to favourable habitat changes.
Environment, Ecology and Biodiversity
2026•Prelims•Paper 1 (GS)•Q.32
With reference to Madhav National Park, which of the following statements is/are correct?
1
It was declared a Tiger Reserve in India in 2025.
2
Sakhya Sagar, which is designated as a Ramsar Site, is situated within this National Park.
3
Its area is shared between Madhya Pradesh and Rajasthan.
Environment
2026•Prelims•Paper 1 (GS)•Q.36
Consider the following statements about Rhynchostylis retusa (Foxtail orchid):
1
It is an epiphytic orchid.
2
The species is endemic to North-east India.
3
It is the State flower of Arunachal Pradesh and Assam.
Environment and Ecology
2026•Prelims•Paper 1 (GS)•Q.40
Which one of the following is the first Plan Vivo certified Reducing Emissions from Deforestation and Forest Degradation (REDD+) project in India?
Environmental ecology, Bio-diversity and Climate Change
2026•Prelims•Paper 1 (GS)•Q.50
Which of the following statements with regard to India's Deep Ocean Mission is/are correct?
1
It was launched by the Ministry of Ports, Shipping and Waterways, Government of India.
2
Matsya-6000 has been designed to carry 3 people for deep sea exploration.
3
Samudrayaan is a project under this mission.
General Studies
2026•Prelims•Paper 1 (GS)•Q.92
A bond whose proceeds are used only to finance or refinance a combination of both environmental and social projects is called:
Environment and Ecology
2025•Prelims•Paper 1 (GS)•Q.31
Consider the following statements :
Statement I
Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.
Statement II
Silica-bearing clay is mixed with limestone while manufacturing cement.
Statement III
Limestone is converted into lime during clinker production for cement manufacturing.
Which one of the following is correct in respect of the above statements?
General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization
2025•Prelims•Paper 1 (GS)•Q.32
Consider the following statements
Statement I
At the 28th United Nations Climate Change Conference (COP28), India refrained from signing the 'Declaration on Climate and Health'.
Statement II
The COP28 Declaration on Climate and Health is a binding declaration; and if signed, it becomes mandatory to decarbonize health sector.
Statement III
If India's health sector is decarbonized, the resilience of its health-care system may be compromised.
Which one of the following is correct in respect of the above statements?
General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization
2025•Prelims•Paper 1 (GS)•Q.34
Consider the following statements :
Statement I
Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change.
Statement II
Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets.
Statement III
Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets.
Which one of the following is correct in respect of the above statements?
General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization
2025•Prelims•Paper 1 (GS)•Q.35
Which one of the following launched the 'Nature Solutions Finance Hub for Asia and the Pacific'?
Environmental ecology
2025•Prelims•Paper 1 (GS)•Q.36
With reference to 'Direct Air Capture', an emerging technology,
which of the following statements is/ are correct?
I. It can be used as a way of carbon sequestration.
II. It can be a valuable approach for plastic production and in food processing.
III. In aviation, it can be a source of carbon for combining with hydrogen to create synthetic low-carbon fuel.
Select the correct answer using the code given below.
Environmental ecology
2025•Prelims•Paper 1 (GS)•Q.37
Regarding Peacock tarantula (Gooty tarantula), consider the following statements :
I. It is an omnivorous crustacean.
II. Its natural habitat in India is only limited to some forest areas.
III. In its natural habitat, it is an arboreal species.
Which of the statements given above is/ are correct?
Biodiversity
2025•Prelims•Paper 1 (GS)•Q.38
Consider the following statements :
I. Carbon dioxide (CO2 ) emissions in India are less than 0.5 t CO2 / capita.
II. In terms of CO2 emissions from fuel combustion, India ranks second in Asia-Pacific region.
III. Electricity and heat producers are the largest sources of CO2 emissions in India.
Which of the statements given above is/are correct?
Climate change
2025•Prelims•Paper 1 (GS)•Q.40
With reference to the planet Earth, consider the following statements :
I. Rain forests produce more oxygen than that produced by oceans.
II. Marine phytoplankton and photosynthetic bacteria produce about 50% of world's oxygen.
III. Well-oxygenated surface water contains several folds higher oxygen than that in atmospheric air.
Which of the statements given above is/ are correct?
General issues on Environmental ecology, Bio-diversity and Climate Change - that do not require subject specialization
2025•Prelims•Paper 1 (GS)•Q.44
Consider the following :
I. Cigarette butts
II. Eyeglass lenses
III. Car tyres
How many of them contain plastic?
Environmental Ecology
2025•Prelims•Paper 1 (GS)•Q.50
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?
Environmental Ecology