💥UPSC 2027,2028 Mentorship (April Batch) + Access XFactor Notes & Microthemes PDF

Type: Prelims Only

  • Modern Indian History-Events and Personalities

    100 years of the Self-Respect Movement in Tamil Nadu

    Why in the News?

    This year marks the centenary of the Self-Respect Movement in Tamil Nadu, a transformative socio-political reform movement.

    About Self-Respect Movement:

    • Overview: Started in 1925 by E.V. Ramasamy Periyar in Tamil Nadu after his exit from the Indian National Congress.
    • Aim: To challenge Brahminical dominance, caste hierarchy, patriarchy, and blind religious practices; to create a rational, egalitarian society.
    • Methods:
      • Promotion of Self-Respect Marriages (without priests or caste rituals).
      • Advocacy of women’s rights – widow remarriage, divorce, property rights, inter-caste marriage.
      • Use of Kudi Arasu journal for spreading radical ideas and reform propaganda.
    • Significance:
      • Laid the foundation of the Dravidian movement in Tamil Nadu.
      • Prioritized social reform over political independence.
      • Gave marginalized communities and women a platform for dignity and equality.

    100 years of the Self-Respect Movement in Tamil Nadu

    Who was E.V. Ramasamy Periyar?

    • Overview: Erode Venkatappa Ramasamy (1879–1973), popularly known as Periyar or Thanthai Periyar (“Father Periyar”).
    • Identity: Social reformer, rationalist, and political thinker; called the “Father of the Dravidian Movement.”
    • Key Roles:
      • Led the Vaikom Satyagraha (1924-25) in Kerala against caste restrictions in temples, earning the title “Vaikom Hero.”
      • Founded the Self-Respect Movement (1925) and later Dravidar Kazhagam.
    • Ideology:
      • Advocated rationalism, atheism, equality, and eradication of caste.
      • Strongly opposed gender inequality and social exploitation.
    • Legacy: Inspired later Dravidian parties (DMK, AIADMK) and influenced Tamil Nadu’s policies on social justice, women’s rights, and education.
    [UPSC 2025] Who among the following was the founder of the ‘Self-Respect Movement’?

    Options:

    (a) ‘Periyar’ E. V. Ramaswamy Naicker* (b) Dr. B. R. Ambedkar (c) Bhaskarrao Jadhav (d) Dinkarrao Javalkar

     

  • International Space Agencies – Missions and Discoveries

    New Horizons and Stellar Parallax Navigation

    Why in the News?

    A recent study has showcased that spacecrafts can locate themselves using a simple stellar parallax method with just two nearby stars, without relying on Earth.

    New Horizons and Stellar Parallax Navigation

    What is Stellar Parallax?

    • Overview: Stellar parallax is the apparent shift in a star’s position against background stars when observed from two different vantage points.
    • Example: On Earth, this is measured every 6 months as the planet moves to opposite sides of its orbit.
    • Parallax Angle: The degree of this shift gives the star’s distance. Larger parallax means the star is closer.
    • Application in Space: By observing stars from both Earth and a spacecraft (billions of km apart), the relative positions can be compared to calculate the spacecraft’s distance.

    About the New Horizons Demonstration:

    • Spacecraft: Launched in 2006, New Horizons explored Pluto (2015) and is now beyond 60 AU (astronomical units).
    • Observation: On April 23, 2020, astronomers measured parallaxes of Proxima Centauri (4.2 light years) and Wolf 359 (7.9 light years) using Earth-based telescopes and New Horizons’ onboard instruments.
    • Results:
      • Proxima’s parallax: 32.4 arcseconds
      • Wolf 359’s parallax: 15.7 arcseconds
      • Derived spacecraft position: 46.89 AU, matching DSN’s 47.11 AU reading.
    • Requirements: Only a camera, onboard computer, and stellar catalogue — no special equipment needed.

    Significance:

    • Self-sufficient Navigation: Enables spacecraft to calculate their position without depending solely on Earth-based radio signals.
    • For Future Missions: Particularly useful for interstellar missions, where Earth’s beacons won’t be practical.
    • Simplicity: Unlike more complex astrometric navigation or pulsar navigation, this method is accessible with minimal hardware.
    • Educational Value: Though not precise enough yet for real-time navigation, it is a proof of concept for deep-space autonomy.
    [UPSC 2012] A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5 km east of the point where he was standing. He had no instruments to find the direction, but he located the polestar. The most convenient way now to reach his village is to walk in the:

    Options: (a) direction facing the polestar

    (b) direction opposite to the polestar

    (c) direction keeping the polestar to his left *

    (d) direction keeping the polestar to his right

     

  • Tribes in News

    In news: Apatani Tribe

    Why in the News?

    The facial tattoos and wooden nose plugs of Apatani women in Arunachal Pradesh, banned in the 1970s, now survive only among older generations, giving them anthropological importance.

    About Apatani Tribe:

    • Overview: A Scheduled Tribe (ST) concentrated in Ziro Valley, Lower Subansiri district, Arunachal Pradesh.
    • Language: Part of the Tani linguistic group, speaking a dialect of the Tibeto-Burman family.
    • Belief System: Paganistic faith worshipping the Sun (Ayo Danyii) and Moon (Atoh Piilo).
    • Festivals: Dree (prayers for harvest and prosperity), Myoko (friendship bonds), along with Yapung and Murung.
    • Global Recognition: Ziro Valley noted for traditional ecological knowledge, proposed as a UNESCO World Heritage Site.

    Unique Features:

    • Distinct Identity: Women traditionally had facial tattoos and wooden nose plugs; banned since the 1970s, seen only among older women today.
    • Sustainable Farming: Practise integrated rice-fish farming on terraced fields, growing rice varieties like Mipya, Emoh, Emeo along with fish (Ngihi).
    • Weaving Tradition: Women weave on a loin loom (Chichin), producing fabrics with geometric and zig-zag designs, dyed with natural extracts.
    • Bamboo Culture: Bamboo central to daily life, crafts, and rituals, symbolising ecological harmony.
    • Community Systems: Maintain sustainable social forestry and village institutions for conservation and cultural continuity.
    [UPSC 2014] Consider the following pairs:

    Tribe : State

    1. Limboo (Limbu) : Sikkim

    2. Karbi : Himachal Pradesh

    3. Dongaria Kondh : Odisha

    4. Bonda : Tamil Nadu

    Which of the above pairs are correctly matched?

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

     

  • Innovations in Biotechnology and Medical Sciences

    RNA–Amino Acid Link clues to Origin of Life

    Why in the News?

    A recent study published in the Nature suggests that simple molecules called aminoacyl-thiols may have helped amino acids stick to RNA (ribonucleic acid) without enzymes, giving clues to how protein-making began on early Earth.

    About the RNA–Amino Acid Link:

    • Discovery: Study showed that aminoacyl-thiols (simple prebiotic molecules) can attach amino acids to RNA directly (aminoacylation) without enzymes.
    • Modern Parallel: In cells today, this is done by aminoacyl-tRNA synthetases before ribosomes build proteins. This created the “chicken-and-egg problem”: proteins are needed to make proteins.
    • Chemical Mechanism:
      • Thioesters: Enable amino acids to attach to RNA (“charging RNA”).
      • Thioacids: Enable amino acids to link into peptides.
    • Robustness: Works at neutral pH, across many amino acids, with unexpected selectivity for RNA despite other molecules being more reactive.

    Significance for Origin of Life:

    • RNA World Hypothesis: Supports the idea that RNA and amino acids interacted directly before enzymes evolved.
    • Chemical Advantage: Shows RNA had a natural edge in early Earth conditions, explaining its central role in life’s origin.
    • Prebiotic Plausibility: Aminoacyl-thiols could form from simple nitriles and thiols, and reactions occurred even in cold/frozen pools resembling early Earth.
    • Evolutionary Pathway: Suggests life began with short peptides, with RNA later evolving control, leading to coded protein synthesis and ribosomes.
    [UPSC 2022] Consider the following statements : DNA Barcoding can be a tool to:

    1. assess the age of a plant or animal.

    2. distinguish among species that look alike.

    3. identify undesirable animal or plant materials in processed foods.

    Which of the statements given above is/are correct ?

    Options: (a) 1 only (b) 3 only (c) 1 and 2 (d) 2 and 3*

     

  • Internal Security Architecture Shortcomings – Key Forces, NIA, IB, CCTNS, etc.

    Technology Perspective and Capability Roadmap (TPCR-2025)

    Why in the News?

    The Ministry of Defence has released the Technology Perspective and Capability Roadmap 2025 (TPCR-2025), a 15-year blueprint for military preparedness and modernization.

    About Technology Perspective and Capability Roadmap (TPCR-2025):

    • Overview: A strategic modernization blueprint released by the Ministry of Defence to guide India’s Armed Forces for the next 10–15 years.
    • Scope: Covers tri-services for multi-domain operations across land, sea, air, cyber, and space.
    • Industry Role: Provides clear requirements to defence industry, MSMEs, and start-ups to focus R&D, manufacturing, and innovation.
    • Policy Alignment: Linked to Atmanirbhar Bharat, reducing import dependence and strengthening indigenous production.
    • Objective: Ensure forces remain technologically competitive, prepared for emerging threats, and resilient in a dynamic security environment.

    Key Features of TPCR-2025:

    • Nuclear & CBRN Preparedness: Strengthening nuclear command systems, survivability infrastructure, radiation detection, decontamination units, unmanned CBRN (Chemical, Biological, Radiological, and Nuclear) vehicles.
    • Drones & Unmanned Systems: Development of stealth drones (range 1,500 km, altitude 60,000 ft), AI-enabled loitering munitions, anti-drone EW bubbles.
    • Electronic & Cyber Warfare: Deployment of advanced jammers, EW payloads, info-dominance systems, and readiness for cyber and space warfare.
    • Service Modernization:
      • Army: New tanks, light tanks, UAV-launched PGMs, electromagnetic weapons.
      • Navy: New destroyers, corvettes, mine vessels, nuclear-powered warships, third aircraft carrier.
      • Air Force: Stratospheric airships, long-range cruise missiles, hardened PGMs.
    • Implementation: Regular industry–services consultations, engagement with MSMEs and start-ups, periodic updates.

    Significance:

    • Serves as a capability roadmap for long-term defence planning.
    • Strengthens domestic defence ecosystem.
    • Ensures future combat readiness in multi-domain operations.
    [UPSC 2020] In India, why are some nuclear reactors kept under “IAEA safeguards” while others are not?

    Options: (a) Some use uranium and others use thorium

    (b) Some use imported uranium and others use domestic supplies

    (c) Some are operated by foreign enterprises and others are operated by domestic enterprises

    (d) Some are State-owned and others are privately owned *

     

  • Nuclear Energy

    Thunderbird Reactor and Cold Fusion Research (2025)

    Why in the News?

    Cold fusion reaction, once dismissed after failed 1989 claims, is back in discussion as US-based researchers report neutron production from their small “Thunderbird Reactor.”

    Thunderbird Reactor and Cold Fusion Research (2025)

    What is Cold Fusion Reaction?

    • Overview: A proposed way to achieve nuclear fusion at room temperature, unlike conventional fusion which needs extremely high heat (100 million °C or more).
    • How it started: In 1989, two chemists, Martin Fleischmann and Stanley Pons, said their palladium-heavy water experiment created more heat than normal chemistry allows.
    • Problem: Other scientists could not reproduce the result. No clear evidence of fusion products (like neutrons or helium) was found. The claim was dismissed, but the idea stayed alive.
    • Why interest remains: If proven, cold fusion could provide limitless, clean, and cheap energy. Research in this area is now called Low-Energy Nuclear Reactions (LENR).

    About the Thunderbird Reactor (2025)

    • Inception: Scientists led by Curtis Berlinguette, University of British Columbia, published in Nature (Aug 2025).
    • Why built: Not to make electricity, but to test if chemistry can affect nuclear reactions.
    • How it works:
      • A plasma thruster shoots deuterium ions (a form of hydrogen) at a palladium metal target.
      • At the same time, an electrochemical cell pushes more deuterium into the palladium.
      • This builds up a very high density of deuterium inside the metal, making fusion more likely.
      • A neutron detector checks if fusion really happens.

    Key Findings:

    • Neutrons detected: When deuterium ions hit palladium, about 130–140 neutrons per second were observed (much higher than background levels).
    • Electrolysis boost: Adding extra deuterium through electrolysis increased the neutron count further.
    • Energy output: The reaction only produced a tiny amount of power (one-billionth of a watt) while consuming 15 watts of electricity. No net energy gain yet.
    [UPSC 2016] India is an important member of the ‘International Thermonuclear Experimental Reactor’. If this experiment succeeds, what is the immediate advantage for India?

    Options: (a) It can use thorium in place of uranium for power generation

    (b) It attain a global role in satellite-navigation

    (c) It can drastically improve the efficiency of its fission reactors in power generation

    (d) It can build fusion reactors for power generation*

     

  • Food Processing Industry: Issues and Developments

    BHARATI Initiative

    Why in the News?

    The Agricultural and Processed Food Products Export Development Authority (APEDA) has launched the BHARATI initiative — Bharat’s Hub for Agritech, Resilience, Advancement and Incubation for Export Enablement.

    About BHARATI Initiative:

    • Launched by: APEDA (Agricultural and Processed Food Products Export Development Authority) in September 2025.
    • Purpose: To incubate and empower 100 agri-food and agri-tech startups, making them export-ready.
    • Target: Support APEDA’s vision of reaching US$ 50 billion (₹4.4 lakh crore) in agri-food exports by 2030.
    • Focus Areas: Export enablement, innovation, incubation, and addressing challenges like perishability, logistics, quality compliance, and sustainability.
    • Policy Alignment: Linked to Atmanirbhar Bharat, Start-Up India, Vocal for Local, and Digital India.

    Key Features:

    • Targeted Products: GI-tagged items, organic foods, superfoods, AYUSH products, processed foods, livestock-based products.
    • Technology Integration: AI-based quality control, blockchain-enabled traceability, IoT-based cold chains, and agri-fintech solutions.
    • Acceleration Model: 3-month programme to build export readiness, ensuring compliance with international food safety and quality standards.
    • Partnership Ecosystem: Collaboration with state boards, IITs/NITs, universities, industry bodies, and accelerators.
    • Scalability: Designed for annual expansion, gradually increasing the number of supported startups.
    [UPSC 2011] With what purpose is the Government of India promoting the concept of “Mega Food Parks”?

    1. To provide good infrastructure facilities for the food processing industry.

    2. To increase the processing of perishable items and reduce wastage.

    3. To provide emerging and

    eco-friendly food processing technologies to entrepreneurs.

    Select the correct answer using the code given below:

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

     

  • Tribes in News

    Particularly Vulnerable Tribal Groups (PVTGs)

    Why in the News?

    The Ministry of Tribal Affairs (MoTA) has written to the Registrar General and Census Commissioner of India (RGI) to enumerate PVTGs separately in Census 2027.

    Who are the PVTGs?

    • Overview: Sub-category of Scheduled Tribes (STs) marked by stagnant or declining population, geographical isolation, pre-agrarian subsistence, economic backwardness, and very low literacy.
    • Origin: Concept recommended by the Dhebar Commission (1960–61) noting inequalities among STs.
    • Historical Evolution:
      • Fourth Five-Year Plan (1969–74): creation of Primitive Tribal Groups (PTGs).
      • Fifth Five-Year Plan (1974–79): 52 groups identified.
      • 2006: PTGs renamed as PVTGs.
    • Present Status: 75 PVTGs recognized across 18 states and 1 UT (Andaman & Nicobar Islands).
    • Characteristics: Small numbers, remote habitation, pre-agricultural practices, hunting and gathering reliance, and in some cases zero or negative population growth.

    Enumeration and Population Estimates:

    • 2011 Census Status: PVTGs were NOT separately enumerated, counted under the broader ST category.
    • Special Cases:
      • 2011 Census: Baigas counted separately, while Abujh Marias, Bharias, Hill Korbas, Kamars subsumed under STs.
      • 2013: Abujh Maria and Hill Korba explicitly added to Chhattisgarh’s ST list via legislation.
    • Recent Estimates: 2023 PM JANMAN survey estimated the population at 47.5 lakh.
      • Madhya Pradesh: 13.22 lakh (highest).
      • Maharashtra: about 6.7 lakh.
      • Andhra Pradesh: about 5.18 lakh.
    • Largest and Smallest:
      • Largest: Baiga of Madhya Pradesh with about 4.14 lakh.
      • Smallest: Sentinelese of Andaman & Nicobar Islands with just 15 individuals.
    • Micro Groups: In 2011, 13 PVTGs had populations below 1,000 including Jarawa, Onge, Sentinelese, Shompen (A&N Islands), Raji (Uttarakhand), Kota (Tamil Nadu), Birhor (Odisha/Bihar), Kamar (Madhya Pradesh), and others.
    [UPSC 2019] 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?

    Options: (a) 1, 2 and 3 (b) 2, 3 and 4 (c) 1, 2 and 4* (d) 1, 3 and 4

     

  • Foreign Policy Watch: India-ASEAN

    In news: Strait of Malacca

    Why in the News?

    Singapore’s PM has acknowledged India’s intent to join the Malacca Straits Patrol (currently undertaken by Malaysia, Indonesia, Thailand, and Singapore).

    In news: Strait of Malacca

    About Strait of Malacca:

    • Location: Narrow waterway in Southeast Asia, between the Malay Peninsula (northeast) and Sumatra, Indonesia (southwest).
    • Length & Width: Extends about 800–900 km; width varies from 65 km in the south to 250 km in the north.
    • Depth: The southern end is narrow and shallow, usually less than 37 m deep, posing navigational challenges.
    • Geological Setting: Part of the Sunda Shelf formation, created after post-glacial sea level rise around 2.6 million years ago.
    • Key Ports: Hosts major hubs like Singapore, Port Klang, Penang, and Melaka, making it one of the busiest shipping lanes globally.

    Strategic and Economic Importance:

    • Global Chokepoint: Links the Indian Ocean (Andaman Sea) with the Pacific Ocean (South China Sea), forming a vital maritime chokepoint.
    • Trade Corridor: The shortest sea route between the Middle East/Africa and East Asia, critical for global commerce.
    • Volume of Trade: Handles about 60% of world maritime trade, including large-scale oil shipments from the Middle East to China, Japan, and Southeast Asia.
    • Economic Impact: Any disruption could severely affect supply chains and energy security worldwide.
    • Geopolitical Significance: Attracts competing interests of India, China, the US, and ASEAN states, making it a hotspot for regional and global strategic rivalry.
    [UPSC 2010] Which one of the following can one come across if one travels through the Strait of Malacca ?

    Options: (a) Bali (b) Brunei (c) Java (d) Singapore*

     

  • Centre approves creation of ‘Environment Auditors’

    Why in the News?

    The Ministry of Environment, Forest and Climate Change (MoEFCC) has introduced the Environment Audit Rules, 2025, creating an independent class of Environment Auditors.

    Who are the Environment Auditors?

    • Overview: Independent, certified professionals comparable to Chartered Accountants, but for environmental compliance.
    • Accreditation: Certification and registration granted by the Environment Audit Designated Agency (EADA).
    • Responsibilities:
      • Ensure compliance across environmental domains.
      • Conduct project audits and assess performance.
      • Collect and analyze environmental samples.
      • Verify self-reported project data.
      • Check conformity with environmental clearances and consents.
      • Calculate environmental compensation in case of violations.
      • Support implementation of Green Credit Registry, Ecomark Certification, and Coastal Regulation Zone (CRZ) compliance.

    About Environment Audit Rules, 2025:

    • Introduced by: MoEFCC in August 2025.
    • Purpose: Establishes independent auditors to assist Central Pollution Control Board (CPCB), SPCBs, and Pollution Control Committees facing manpower/resource gaps.
    • Objectives:
      • Strengthen monitoring and compliance.
      • Enhance transparency, accountability, credibility.
      • Promote sustainable governance and stakeholder trust.
    • Scope of Audits: Covers compliance with Green Credit Rules, Ecomark Rules 2024, E-Waste Rules 2022, Plastic Waste Rules 2016, Battery Waste Rules 2022, Van (Sanrakshan Evam Samvardhan) Adhiniyam 1980, Wild Life Protection Act 1972 and related rules.
    • Institutional Features:
      • EADA certifies, registers, and monitors auditors.
      • Categories: Certified Environment Auditor (qualified) and Registered Environment Auditor (certified + authorised).
    • Certification Pathways:
      • Recognition of Prior Learning (RPL) for experienced professionals.
      • National Certification Examination (NCE) for new entrants.
    • Registration: Valid for 5 years, renewable on review; requires technical proof and clean track record.
    • Oversight: A Steering Committee (chaired by MoEFCC Additional Secretary) supervises; government retains powers to issue guidelines, resolve disputes, and order audits.
    [UPSC 2022] Which one of the following has been constituted under the Environment (Protection) Act, 1986 ?

    Options: (a) Central Water Commission (b) Central Ground Water Board (c) Central Ground Water Authority* (d) National Water Development Agency