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Type: Prelims Only

  • Solar Energy – JNNSM, Solar Cities, Solar Pumps, etc.

    International Astronomical Union (IAU) 

    28 November 2025 | Prelims Only | Science and Technology
    Mains Paper 3: Achievements Of Indians In S&T

    Why in the news?

    • A 3.5-billion-year-old Martian crater has been named after Indian geologist M.S. Krishnan. The naming was approved by the International Astronomical Union (IAU).
    • Several other names proposed by Kerala scientists for Martian landforms were also approved.

    About the Martian Crater

    • Estimated to be 3.5 billion years old, dating back to Mars’ early geological history.
    • Located in a region studied for traces of ancient water and habitability.

    Who Was M.S. Krishnan?

    • Full name: Maharajapuram Seetharaman Krishnan
    • One of India’s most influential geologists, known as a foundational figure in modern Indian geological studies.
    • Served as Director, Geological Survey of India (GSI) (1950–1956).

    Major Contributions

    • Mapped India’s geological structures, including:
      • Indian stratigraphy
      • Peninsular shield
      • Himalayan formations
    • Played a leading role in mineral exploration and petroleum geology in India.
    • Contributed to studies on:
      • Gondwana formations
      • Economic geology
      • Earth resources of India

    Famous Work

    • Author of the landmark textbook “Geology of India and Burma”, a globally referenced work in earth sciences.

    About the International Astronomical Union (IAU)

    • Founded: 1919
    • A senior international body that governs professional astronomical activities worldwide.
    • Mission: Promote and safeguard astronomy through research, communication, education, development, and international cooperation.
    • Headquarters: Paris, France
    • India is a member of it 
    What is the purpose of ‘evolved Laser Interferometer Space Antenna (ELISA)’ project? (2017)

    (a) To detect neutrinos 

    (b) To detect gravitational waves 

    (c) To detect the effectiveness of missile defence system 

    (d) To study the effect of solar flares on our communication systems

    This PYQ is selected because it directly tests knowledge of a major international scientific venture in the field of astronomy/cosmology, which is conceptually linked to the mandate of the IAU

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  • Skilling India – Skill India Mission,PMKVY, NSDC, etc.

    Entrepreneur-in-Residence (EIR) Programme & BRIC  

    28 November 2025 | Prelims Only | Science and Technology
    Mains Paper 3: Indigenization Of Technology

    Why in the news? 

    At the 3rd Annual General Meeting of the Biotechnology Research and Innovation Council (BRIC), Union Minister Dr. Jitendra Singh highlighted the growing importance of the Entrepreneur-in-Residence (EIR) Programme and India’s rising biotech innovation ecosystem.

    Entrepreneur-in-Residence (EIR) Programme

    • It is one of the programmes launched under the National Initiative for Developing and Harnessing Innovations (NIDHI).
    • A Government of India initiative to bridge the gap between research and enterprise.
    • Encourages young scientists, innovators, and researchers to become scientist-entrepreneurs.
    • Helps convert lab research → market-ready innovations.

    About BRIC

    • Established: 2023
    • Type: Pan-India umbrella network of biotechnology research institutions.
    • First major experiment in merging multiple institutes under one collaborative body.
    • Ranked as India’s top organization in biological sciences research (Nature Index India 2025).
    Which of the following statements is/are correct regarding National Innovation Foundation India (NIF)? (2015)

    (1) NIF is an autonomous body of the Department of Science and Technology under the Central Government. 

    (2) NIF is an initiative to strengthen the highly advanced scientific research in India’s premier scientific institution in collaboration with highly advanced foreign scientific institution. 

    Select the correct answer using the code given below. 

    (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2

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  • Tribes in News

    Israel to Bring Remaining 5,800 Bnei Menashe Jews From Northeast India

    28 November 2025 | Prelims Only | Indian Society
    Mains Paper 1: Diversity Of India

    Why in the news?

    • On 23 November 2025, Israel approved a major plan to bring all remaining 5,800 members of the Bnei Menashe Jewish community from Northeast India by 2030.
    • This marks a significant step in the decades-long Aliyah (immigration to Israel) process.

    Who are the Bnei Menashe?

    • Indigenous community from Manipur and Mizoram.
    • Claim descent from Menashe (Manasseh), one of the Ten Lost Tribes of Israel exiled by the Assyrian Empire ~2,700 years ago.
    • Faced historical disputes over their Jewish identity.
    • In 2005, Rabbi Shlomo Amar, the then Sephardi Chief Rabbi of Israel, formally recognised them as “descendants of Israel”, enabling immigration.
    In India, if a religious sect/community is given “the status of a national minority, what special advantages is it entitled to? (2011)

    1. It can establish and administer exclusive educational institutions. 

    2. The President of India automatically nominates a representative of the community to Lok Sabha. 

    3. It can derive benefits from the Prime Minister’s 15-Point Programme. 

    Which of the statements given above is/are correct? 

    (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3

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  • New Species of Plants and Animals Discovered

    Hawfinch Sighting in Jim Corbett National Park  

    28 November 2025 | Prelims Only | Environment
    Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the news?

    • A Hawfinch (Coccothraustes coccothraustes), a bird species native to Europe, North Africa, and temperate Asia, was recorded on 23 November in the Dhela zone of Jim Corbett National Park, Uttarakhand. This is considered a vagrant bird sighting.

    About Hawfinch (Coccothraustes coccothraustes)

    • Family: Fringillidae (Finches)
    • Size: ~18 cm
    • Wingspan: 29–33 cm
    • Distinctive Feature: Very powerful, heavy bill capable of cracking extremely hard seeds/nuts.
    • Plumage: Males and females similar; males slightly darker.

    Native Range

    • Europe and North Africa
    • Temperate Asia, including:
      • Mongolia and Kazakhstan
    • Not native to India.

    Status in India

    • Sighting classified as a vagrant record—bird appears outside its usual distribution range.
    • Only two previous records in the Indian subcontinent:
      • Muzaffarabad (1908) – PoK
      • Aliabad (2017) – PoK
    • This is one of the very few confirmed sightings.
    Why is a plant called Prosopis juliflora often mentioned in the news? (2018) 

    (a) Its extract is widely used in cosmetics. 

    (b) It tends to reduce the biodiversity in the area in which it grows

    (c) Its extract is used in the synthesis of pesticides

    (d) None of the above

    This question tests the critical concept of non-native or exotic species impacting biodiversity, which is the implicit environmental concern raised by the Hawfinch sighting.

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  • Water Management – Institutional Reforms, Conservation Efforts, etc.

    Mekedatu Balancing Reservoir Project

    28 November 2025 | Prelims Only | Polity
    Mains Paper 2: Parliament & State Legislatures

    Why in the news?

    • Karnataka has decided to submit a revised Detailed Project Report (DPR) for the Mekedatu balancing reservoir across the Cauvery River.
    • The Supreme Court termed Tamil Nadu’s challenge as “premature”, enabling the CWMA and CWC to examine the project.

    Location & River

    • Mekedatu is located in Ramanagara district, ~100 km from Bengaluru.
    • The project is proposed on the inter-State Cauvery river.
    • Karnataka = upper riparian; Tamil Nadu = lower riparian.

    Why Does Karnataka Want It?

    • Bengaluru water demand:
      • Present: 2,600 MLD
      • Supply: 2,100 MLD → shortage of 500 MLD
    • Population to reach 20 million in 6 years → demand may rise to 4,000 MLD.
    • Shivakumar argues Mekedatu will ensure regulated release to Tamil Nadu, even in poor rainfall years.

    Why Is Tamil Nadu Opposed?

    • Trust deficit due to the history of Cauvery disputes.
    • Concern: Karnataka may store more water and release it selectively.
    • TN argues the project violates the 2018 SC judgment and Cauvery Tribunal’s final award.

    Centre’s Position

    • 2019: Karnataka submitted DPR → CWC → CWMA.
    • MoEFCC (2019): Sought an “amicable solution” due to inter-State dispute.
    • 2024 (Feb): CWMA referred DPR back to CWC after deliberations.
    • Now: DPR to be examined afresh; CWMA/CWC can facilitate dialogue.

    Constitutional & Legal Angle

    • Inter-State Rivers: Union List Entry 56 – regulation and development of inter-State rivers.
    • River Boards Act, 1956 (not effectively implemented).
    • Cauvery Water Disputes Tribunal (CWDT): Award notified in February 2013.
    • Supreme Court Judgment (2018):
      • Reallocated shares;
      • Gave 4.75 TMC drinking water allocation to Bengaluru.

     

    Recently, linking of which of the following rivers was undertaken? (2016)

    (a) Cauvery and Tungabhadra 

    (b) Godavari and Krishna 

    (c) Mahanadi and Son 

    (d) Narmada and Tapti

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  • Bastar Olympics

    27 November 2025 | Prelims Only | Trivia
    Mains Paper 3: External State & Non-State Actors: Challenges To Internal Security.

    Why in the news? 

    • The Bastar Olympics is a government-led sporting initiative in Chhattisgarh’s Bastar region, an area historically affected by Left-Wing Extremism (LWE).
    • It has become a symbol of normalisation, trust-building, and socio-cultural revival as Maoist influence recedes.

    What are the Bastar Olympics?

    • A regional multi-sport event launched by the Chhattisgarh government.
    • Conducted across all 7 districts of the Bastar region:
      • Bastar, Dantewada, Kanker, Kondagaon, Narayanpur, Sukma, Bijapur.
    • Includes 11 sports:
       Archery, Kabaddi, Athletics, Badminton, Football, Hockey, Karate, Weightlifting, Kho-Kho, Volleyball, Tug-of-war.
    Prelims-Relevant Themes Emerging

    • Internal Security: Platform for reducing alienation in LWE regions.
    • Social Issues: Women’s participation & empowerment.
    • Tribal Affairs: Inclusion of PVTGs, revival of cultural identity.
    • Governance: Last-mile delivery and state presence in remote areas.
    • Sports & Youth: Identification of rural sporting talent.
    Consider the following statements about Particularly Vulnerable Tribal Groups (PVTGs) in India: 

    1. PVTGs reside in 18 States and one Union Territory. 

    2. A stagnant or declining population is one of the criteria for determining PVTG status. 

    3. There are 95 PVTGs officially notified in the country so far. 

    4. Irular and Konda Reddi tribes are included in the list of PVTGs. 

    Which of the statements given above are correct? 

    (a) 1, 2 and 3 

    (b) 2, 3 and 4 

    (c) 1, 2 and 4 

    (d) 1, 3 and 4

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  • Climate Change Impact on India and World – International Reports, Key Observations, etc.

    Ningaloo Reef Mass Coral Mortality 

    27 November 2025 | Prelims Only | Environment
    Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    A new survey in 2025 shows that nearly 70% of corals in Australia’s UNESCO World Heritage–listed Ningaloo Reef have died due to the most intense and prolonged marine heatwave on record.

    About Ningaloo Reef  

    • Located in Western Australia.
    • A UNESCO World Heritage Site.
    • One of the largest fringing reefs in the world (~260 km long).
    • Important for marine biodiversity, supporting whale sharks, turtles, reef sharks, and diverse coral species.

    Extent of Coral Mortality

    • ~70% mortality recorded in latest survey.
    • In eight northern lagoon sites (Osprey → Tantabiddi Sanctuary Zones), mortality >60%.
    • Of 1,600+ corals assessed in March, only ~600 survived by October.

    Species Impact

    • Highly Affected (Dominant Species Lost)

        • Staghorn corals: Acropora tenuis, Acropora millepora and Acropora spicifera
        • Thin birdsnest coral (Seriatopora hystrix).

    • Relatively Resilient

      • Veron’s tube coral (Echinopora ashmorensis)
      • Lesser knob coral (Cyphastrea microphthalma)
    • Structural decline:
      • Dead corals now overgrown by sponges, turf algae, reducing reef stability & biodiversity.

    Broader Ecological Significance

    • Coral reefs support ~1/3 of global marine species.
    • Mass mortality compromises: Fish breeding grounds, Shelter for marine organisms, Coastal protection and Tourism & local economies.

    Widespread Global Coral Stress

    According to the United States National Oceanic and Atmospheric Administration (NOAA):

    • 84.4% of the world’s reef areas experienced bleaching-level heat stress (Jan 2023–Sept 2025).
    • Mass bleaching in 83+ countries.
    • Marine heatwaves in 2023 lasted 4× longer than the long-term average and affected 96% of the world’s oceans.
    The scientific view is that the increase in global temperature should not exceed 2 ∘ C above pre-industrial level. If the global temperature increases beyond 3 ∘ C above the pre-industrial level, what can be its possible impact/impacts on the world? 

    1. Terrestrial biosphere tends toward a net carbon source. 

    2. Widespread coral mortality will occur. 

    3. All the global wetlands will permanently disappear. 

    4. Cultivation of cereals will not be possible anywhere in the world. 

    Select the correct answer using the code given below: 

    (a) 1 only (b) 1 and 2 only (c) 2, 3 and 4 only (d) 1, 2, 3 and 4 only

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  • Operation Pawan  

    27 November 2025 | Prelims Only | International Relations
    Mains Paper 2: Bilateral, Regional and Global Groupings and agreements involving India

    Why in the News?

    • For the first time, the Chief of Army Staff (COAS) General Upendra Dwivedi paid homage at the National War Memorial to soldiers who died during Operation Pawan (1987–1990).
    • Event held on 25 November 2025.

    What was Operation Pawan?

    • A major military operation launched by the Indian Peace Keeping Force (IPKF) in Sri Lanka.
    • Objective: Disarm the LTTE under the Indo–Sri Lanka Accord (1987).
    • Duration: October 1987 – 1990.

    Background

    • Under the Indo–Sri Lanka Peace Accord (July 1987):
      • India agreed to deploy IPKF to enforce peace in Northern & Eastern Sri Lanka.
      • The LTTE initially agreed to surrender weapons but soon reneged.

    Casualties in Operation

    • Hundreds of Indian soldiers killed, and over 1,000 injured.
    • One of India’s largest overseas military operations.

    National War Memorial

    • Location: New Delhi, near India Gate.
    • Dedicated to soldiers of post-Independence operations including:
      • 1947–48, 1962, 1965, 1971 wars
      • Kargil 1999
      • IPKF operations, and counter-insurgency missions.

    Importance of the IPKF Mission 

    • First large-scale out-of-country deployment of Indian forces.
    • Political and military complexities:
      • Fighting LTTE, once seen sympathetically by India.
      • Hostile terrain and guerrilla warfare challenges.
    Operations undertaken by the Army towards upliftment of the local population in remote areas to include addressing of their basic needs is called:  (2024)

    (a) Operation Sankalp 

    (b) Operation Maitri 

    (c) Operation Sadbhavana 

    (d) Operation Madad

    This question is highly relevant as it tests the specific format of knowledge required for Operation Pawan (the name and mission of a defence action).

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  • Health Sector – UHC, National Health Policy, Family Planning, Health Insurance, etc.

    Sleep Apnea & Parkinson’s Disease 

    27 November 2025 | Prelims Only | Science and Technology
    Mains Paper 3: Awareness in various sc and tech fields

    Why in the News?

    • A new study published in JAMA Neurology (Nov 24, 2025) found that untreated Obstructive Sleep Apnea (OSA) can nearly double the risk of developing Parkinson’s disease.
    • The study analysed 11 million+ U.S. military veterans’ medical records (1999–2022).
    • Use of CPAP (Continuous Positive Airway Pressure) significantly reduces the elevated risk, making sleep quality a potential neuroprotective factor.

    Key Findings

    • Untreated OSA → ~2× higher likelihood of developing Parkinson’s.
    • CPAP therapy helps maintain oxygen levels → reduces neurodegeneration risk.
    • Repeated oxygen drops during sleep may lead to long-term neuronal stress.
    • Parkinson’s disease risk increases naturally with age, especially >60 years, but untreated OSA further elevates vulnerability.

    About Parkinson’s Disease 

    • A progressive neurodegenerative disorder affecting movement.
    • Caused by loss of dopaminergic neurons in the substantia nigra.
    • Symptoms: tremors, rigidity, bradykinesia, cognitive decline (late stages).
    • No cure; treatments focus on symptom management.

    Prelims Pointers

    • New association identified: OSA ↔ Parkinson’s disease risk.
    • Published in JAMA Neurology.
    • Largest dataset used for this linkage: 11 million veterans.
    • CPAP is not just a sleep device—it may offer neuroprotection.
    • Chronic intermittent hypoxia implicated in neurodegeneration.
    Excessive release of the pollutant carbon monoxide (CO) into the air may produce a condition in which oxygen supply in the human body decreases. What causes this condition? (2010)

    (a) When inhaled into the human body CO is converted into CO2

    (b) The inhaled CO has much higher affinity for haemoglobin as compared to oxygen

    (c) The inhaled CO destroys the chemical structure of haemoglobin

    (d) The inhaled CO adversely affects the respiratory centre in the brain

    This PYQ is chosen because the core pathological connection linking Sleep Apnea and Parkinson’s disease is the concept of chronic oxygen deprivation (Hypoxia) and its neurodegenerative impact.

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  • Forest Conservation Efforts – NFP, Western Ghats, etc.

    Aravalli Hills: 90% Lose Protection, FSI Red-Flag Ignored

    27 November 2025 | Prelims Only | Environment
    Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Why in the News?

    • On 20 Nov 2025, the Supreme Court approved the government’s definition of Aravalli Hills as any hill 100 m or higher above local ground.
    • Problem: This definition excludes 90% of Aravalli hills, making them open for mining and construction.

    Background

    • The Aravalli Range runs from Delhi to Gujarat through Haryana and Rajasthan.
    • It is oldest fold mountains in India and plays a key role in ecology, dust control, groundwater, and wildlife corridors.
    • In 2024, the SC asked the government to create a uniform Aravalli definition.

    FSI’s Warning

    • Lower hills (20–100 m) act as natural windbreaks, blocking sand and dust from Thar desert.
    • Removing protection risks:
      • Higher air pollution in NCR
      • Loss of wildlife corridors
      • Impact on agriculture and farmer livelihoods
    If there were no Himalayan ranges, what would have been the most likely geographical impact on India? (2010)

    1. Much of the country would experience the cold waves from Siberia. 

    2. Indo-gangetic plain would be devoid of such extensive alluvial soils. 

    3. The pattern of monsoon would be different from what it is at present. 

    Which of the statements given above is/are correct? 

    (a) 1 only 

    (b) 1 and 3 only 

    (c) 2 and 3 only 

    (d) 1, 2 and 3

    The profound geographical and ecological functions of a major mountain range, which directly parallels the catastrophic risks associated with losing the Aravallis.

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