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Type: Prelims Only

  • Pyrite

    Why in the News?

    Scientists have discovered the oldest known evidence of fire making by prehistoric humans in England. The findings include heated clay, heat shattered flint handaxes and pieces of iron pyrite, which can generate sparks when struck against flint.

    About Pyrite

    • Pyrite is a brass yellow mineral with a bright metallic lustre.
       • Chemical composition: Iron sulfide (FeS₂).
       • It is the most common sulfide mineral found on Earth.
       • The name is derived from the Greek word pyr meaning fire, as pyrite emits sparks when struck by metal or flint.
       • Nodules of pyrite found in prehistoric burial mounds suggest its early use in fire making.
       • Commonly known as “Fool’s Gold” due to its superficial resemblance to gold.

    Distinguishing Pyrite from Gold

    • Pyrite is much lighter than gold.
       • It is harder than gold and cannot be scratched with a fingernail or a pocket knife.
       • Gold is soft, malleable and can be easily scratched.

    Occurrence

    • Found worldwide in diverse geological settings.
       • Occurs in sedimentary deposits, hydrothermal veins and as a constituent of metamorphic rocks.

    Uses of Pyrite

    • Source of iron and sulfur.
       • Used in the manufacture of sulfuric acid.
       • Used to produce iron sulfate.
       • Iron sulfate applications include nutritional supplements, ink, lawn conditioner, water treatment and flocculation, and moss control.
       • Iron sulfate derived from pyrite is used in the treatment of iron deficiency anemia.
       • Some varieties contain microscopic gold and can be mined as a gold ore.

    Prelims Pointer

    • Pyrite’s ability to produce sparks made it an important material for early human fire technology.
    Ilmenite and rutile, abundantly available in certain coastal tracts of India, are rich sources of which one of the following? (2023)

    (a) Aluminium 

    (b) Copper 

    (c) Iron 

    (d) Titanium

  • Pax Silica Initiative

    Why in the News?

    The Congress party recently criticised the Prime Minister over India’s exclusion from the United States led strategic initiative known as Pax Silica, citing a perceived downturn in India US relations.

    About Pax Silica Initiative

    • Pax Silica is a US led strategic initiative aimed at building a secure, resilient and innovation driven global silicon supply chain.
       • The initiative covers the entire value chain from critical minerals and energy inputs to advanced manufacturing, semiconductors, artificial intelligence infrastructure and logistics.
       • The term Pax is derived from Latin, meaning peace, stability and long term prosperity.
       • Silica refers to the compound refined into silicon, a foundational element for computer chips that power AI and advanced digital technologies.
       • The initiative seeks to reduce coercive dependencies, protect critical materials and capabilities essential for AI, and enable trusted nations to develop and deploy emerging technologies at scale.

    Member Countries

    • Japan, South Korea, Singapore, Netherlands, United Kingdom, Israel, United Arab Emirates and Australia

    Core Objectives

    • Jointly address vulnerabilities and opportunities in AI related supply chains.
       • Cooperation in critical minerals, semiconductor design, fabrication and packaging.
       • Strengthen logistics, transportation, compute infrastructure and energy grids.
       • Promote new joint ventures and strategic co investment opportunities.
       • Protect sensitive technologies and critical infrastructure from undue access or control by countries of concern.
       • Build trusted technology ecosystems including ICT systems, fibre optic cables, data centres, foundational AI models and applications.

    Significance for Prelims

    • Focuses on strategic technology security rather than a formal treaty.
       • Closely linked to semiconductor and AI geopolitics.
       • Reflects US efforts to align technology supply chains among trusted partners.
    With the present state of development, Artificial Intelligence can effectively do which of the following? (2020)

    (1) Bring down electricity consumption in industrial units 

    (2) Create meaningful short stories and songs 

    (3) Disease diagnosis 

    (4) Text-to-Speech Conversion 

    (5) Wireless transmission of electrical energy 

    Select the correct answer using the code given below: 

    (a) 1, 2, 3 and 5 only (b) 1, 3 and 4 only (c) 2, 4 and 5 only (d) 1, 2, 3, 4 and 5

  • New Ramsar Sites in India

    Why in the News?

    Siliserh Lake in Rajasthan and Kopra Jalashay in Chhattisgarh have been designated as Ramsar Sites, recognising their international importance as wetlands.

    Siliserh Lake

    Location: Alwar district, Rajasthan
     Type: Human made lake
     Setting: Located within the buffer zone of Sariska Tiger Reserve
     History: Constructed in 1845 by Maharaja Vinay Singh to supply drinking water to Alwar city
     Climate Zone: Semi arid region
     Ecological Significance:
     • Important water source in a dry landscape
     • Supports diverse wetland and terrestrial biodiversity

    Fauna:

    • Around 149 bird species
     • 17 mammal species
     • Vulnerable species: River tern
     • Endangered species: Tiger
     • Supports more than 1 percent of the biogeographic population of Black Stork (Ciconia nigra)

    Kopra Jalashay

    Location: Bilaspur district, Chhattisgarh
     Type: Reservoir
     River System: Upper catchment of the Mahanadi River
     Hydrological Importance:
     • Strong hydrological and ecological connectivity
     • Creates a mosaic of wetland habitats

    Avifaunal Importance:

    • Supports over 60 migratory bird species
     • Used for nesting, feeding and as a stopover site

    Fauna:

    • Vulnerable species: Greater Spotted Eagle (Aquila clanga)
     • Endangered species: Egyptian Vulture (Neophron percnopterus)

    Ramsar Convention Key Point for Prelims

    • Ramsar Convention is an international treaty for conservation and wise use of wetlands
       • Adopted in 1971 at Ramsar, Iran
       • India is a contracting party since 1982
    If a wetland of international importance is brought under the ‘Montreux Record’, what does it imply? (2014)

    (a) Changes in ecological character have occurred, are occurring or are likely to occur in the wetland as a result of human interference. 

    (b) The country in which the wetland is located should enact a law to prohibit any human activity within five kilometres from the edge of the wetland. 

    (c) The survival of the wetland depends on the cultural practices and traditions of certain communities living in its vicinity and therefore the cultural diversity therein should not be destroyed. 

    (d) It is given the status of ‘World Heritage Site’

  • Delhi Parsi Anjuman Centenary  

    Why in the News?

    Delhi Parsi Anjuman DPA is celebrating its 100 years of establishment in 2025.

    About Parsis in India

    • Parsis migrated to India around 8th century CE from Persia modern day Iran due to religious persecution.
     • They followed sea trade routes and mainly settled in Gujarat and Maharashtra.
     • Known for contributions in trade industry law healthcare and public life.

    Parsis in Delhi

    • First Parsi settlement in Delhi dates to the 19th century.
     • Legend links early Parsi presence to Meherjirana the first Dastur invited by Mughal emperor Akbar during the 16th century.
     • Major influx occurred after British shifted capital from Calcutta to Delhi in 1911.
     • First recorded Parsi migrant to Delhi was Naowroji Kapadia from Bharuch Gujarat.

    Delhi Parsi Anjuman DPA

    • Established in 1925 by 40 trustees.
     • Location Bahadur Shah Zafar Marg New Delhi.
     • First President Naowroji Kapadia.
     • Meaning of Anjuman Persian word meaning congregation.
     • Objective Cultural spiritual and social hub for the Parsi community in Delhi.
     • Current Parsi population in Delhi around 500 in 2023-24.

    Key Institutions under DPA

    • Dar-e-Mehr Zoroastrian fire temple established in 1961.
     • Only Zoroastrian fire temple in North India.
     • Dharamshala banquet hall and Katgara Hall newly renovated in 2025.

    Important Facts for Prelims

    • Delhi Parsi Anjuman founded in 1925.
     • Centenary year 2025.
     • Dar-e-Mehr in Delhi is the only fire temple in North India.
     • Parsis played a key role in shaping Delhi’s legal architectural and healthcare institutions.

    Which one of the following was the latest inclusion in the Intangible Cultural Heritage List of UNESCO? (2024)

    (a) Chhau dance 

    (b) Durga Puja 

    (c) Garba dance 

    (d) Kumbh Mela

  • Agentic AI  

    Why in the News?

    Microsoft Chairman and CEO Satya Nadella recently noted that India is witnessing strong momentum in the adoption and deployment of artificial intelligence, particularly agentic AI applications.

    About Agentic AI

    Agentic AI is an advanced form of artificial intelligence that emphasises autonomous decision-making and action. It is designed to act independently in a goal driven manner with minimal human intervention.

    Core Concept

    • Based on AI agents that simulate human-like decision making
     • Capable of setting goals, planning steps, and executing tasks on its own
     • Goes beyond traditional AI systems that mainly respond to prompts or analyse data

    Prelims Pointers

    • Agentic AI emphasizes autonomy and goal orientation
    • Uses large language models as its reasoning engine
    • Key stages include perception, reasoning, planning, action, and reflection
    • Represents an evolution beyond prompt based AI systems
    With the present state of development, Artificial Intelligence can effectively do which of the following? (2020)

    (1) Bring down electricity consumption in industrial units

    (2) Create meaningful short stories and songs

    (3) Disease diagnosis

    (4) Text-to-Speech Conversion

    (5) Wireless transmission of electrical energy

    Select the correct answer using the code given below:

    (a) 1, 2, 3 and 5 only (b) 1, 3 and 4 only (c) 2, 4 and 5 only (d) 1, 2, 3, 4 and 5

  • Diving Support Craft A20

    Why in the news?

    The Indian Navy is set to commission Diving Support Craft (DSC) A20 at Kochi under the Southern Naval Command, marking a key milestone in indigenous naval capability.

    About Diving Support Craft A20

    • First vessel of the indigenously designed and constructed Diving Support Craft class
     • Lead ship in a series of five DSCs
     • Built by M s Titagarh Rail Systems Limited, Kolkata
     • Designed for a wide range of diving and underwater missions in coastal waters

    Prelims Pointers

    • DSC A20 is an indigenously built naval auxiliary vessel
    • Builder: Titagarh Rail Systems Limited
    • Hull type: Catamaran
    • Command: Southern Naval Command
    • Focus areas include diving operations, underwater missions, and salvage support
    Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently? (2016)

    (a) Amphibious warfare ship 

    (b) Nuclear-powered submarine 

    (c) Torpedo launch and recovery vessel 

    (d) Nuclear-powered aircraft carrier

  • Pallas’s Gull 

    Why in the News?

    The rare migratory Pallas’s Gull was recently sighted at Udhwa Bird Sanctuary in Jharkhand, marking its return after nearly a decade.

    About Pallas’s Gull

    • Also known as the Great Black headed Gull
     • One of the largest gull species in the world
     • World’s largest black headed gull and third largest gull overall
     • Family: Laridae
     • Scientific name: Ichthyaetus ichthyaetus

    Conservation Status: IUCN Red List: Least Concern

    Distribution and Migration

    • Breeds in colonies across marshes and islands of southern Russia, Kazakhstan, and Mongolia
     • Migratory species
     • Winters in the Mediterranean region, Arabian Peninsula, and Indian subcontinent.

    Prelims Pointers

    • Pallas’s Gull is a migratory wetland dependent bird
    • Associated with Central Asian Flyway
    • Udhwa is Jharkhand’s only bird sanctuary and a Ramsar Site
    • Species belongs to the Laridae family
    Which of the following National Parks is unique in being a swamp with floating vegetation that supports a rich biodiversity? (2015)

    (a) Bhitarkanika National Park 

    (b) Keibul Lamjao National Park 

    (c) Keoladeo Ghana National Park 

    (d) Sultanpur National Park

  • Boreendo

    Why in the News?

    Boreendo, an ancient traditional musical instrument from Pakistan, has been inscribed on UNESCO’s List of Intangible Cultural Heritage in Need of Urgent Safeguarding.

    About Boreendo

    • Also known as Bhorindo
     • Traditional wind instrument from the Sindh region of Pakistan
     • Believed to be around 5,000 years old
     • Origins traced to Mohenjo Daro of the Indus Valley Civilisation

    Physical Features

    • Hollow spherical body with sound holes
     • Made of clay that is sun dried and kiln fired
     • Decorated using clay paint

    Cultural Practices

    • Played mainly by men
     • Women traditionally decorate the instrument
     • Used during winter bonfires, weddings, and local festivals

    UNESCO Significance

    • Listed under Intangible Cultural Heritage in Need of Urgent Safeguarding
     • Recognition highlights the risk of decline due to reduced practitioners and changing cultural practices
     • Aims to promote preservation, transmission, and awareness of the art form

    Prelims Pointers

    • Region: Sindh, Pakistan
     • Material: Clay
     • Type: Wind musical instrument
     • Civilisational link: Indus Valley Civilisation
     • UNESCO list focuses on endangered living traditions

    The famous female figurine known as ‘Dancing Girl’, found at Mohenjo-daro, is made of: (2025)

    (a) carnelian 

    (b) clay 

    (c) bronze 

    (d) gold

  • Charaichung Festival at Majuli  

    Why in the News?

    Assam’s Majuli island hosted the second edition of the Charaichung Festival, aimed at reviving Asia’s first protected Royal Bird Sanctuary, Charaichung, established in 1633 AD.

    About Charaichung Sanctuary

    • Established in 1633 AD by Ahom King Swargadeu Pratap Singha (Burha Roja).
    • Considered Asia’s first protected royal bird sanctuary.
    • Holds a 392-year-old legacy.
    • Once thriving, the sanctuary has deteriorated and now requires active conservation.
    • Home to around 150 species of indigenous and migratory birds.

    About the Charaichung Festival

    • Held from December 7 to 10, 2025, at Majuli.
    • Organised by Majuli Sahitya and local communities.
    • Objective:
       • Revive Charaichung sanctuary
       • Strengthen bird conservation
       • Promote Majuli as a global tourism destination
    • Includes a special forest conservation exhibition showcasing biodiversity protection efforts.

    Significance of Majuli

    • Recognised as the world’s largest river island.
    • One of India’s important bird habitats, attracting domestic and international nature enthusiasts.
    • Rich in biodiversity and cultural heritage.
    Which of the following National Parks is unique in being a swamp with floating vegetation that supports a rich biodiversity? (2015)

    (a) Bhitarkanika National Park 

    (b) Keibul Lamjao National Park 

    (c) Keoladeo Ghana National Park 

    (d) Sultanpur National Park

  • Mass Mortality of Goniopora Corals at One Tree Reef  

    Why in the News?

    A new study published in Proceedings of the Royal Society B (December 10, 2025) reports unprecedented coral bleaching and mortality at One Tree Reef (OTR) in the southern Great Barrier Reef, driven by extreme heat and rapid spread of black band disease (BBD).

    Background

    • Coral reefs have shaped Earth’s climate for 250 million years.
    • OTR has not witnessed bleaching of this severity for decades.
    • The impacted species, Goniopora (flowerpot or daisy corals), typically live in lagoons and turbid reefs and are known for thermal tolerance, making their mass mortality alarming.

    Why Black Band Disease Spread at OTR

    • BBD is common in the Caribbean but historically rare in the southern Great Barrier Reef.
    • OTR is offshore and not affected by major nutrient pollution — usually a known trigger.
    • Other coral genera at OTR that bleached did not develop BBD.
    • Northern Great Barrier Reef surveys (2024) showed very low incidence (1–2 percent).
    Consider the following statements: (2018)

    1. Most of the world’s coral reefs are in tropical waters. 

    2. More than one-third of the world’s coral reefs are located in the territories of Australia, Indonesia and Philippines. 

    3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests. 

    Which of the statements given above is/are correct? 

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