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Type: Prelims Only

  • Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

    Microsoft unveils ‘Majorana 1’ Chip for Quantum Computing

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Majorana 1 Chip

    Why in the News?

    Microsoft has unveiled Majorana 1, a groundbreaking quantum chip that introduces a more stable and scalable approach to quantum computing.

    What is Microsoft’s Majorana 1 Chip?

    • Majorana 1 is Microsoft’s latest quantum processor that introduces a new type of stable and scalable qubit based on Majorana fermions.
    • Microsoft believes that this breakthrough could enable practical quantum computing by 2027-29.
    • Majorana Fermions:
      • First theorized by Ettore Majorana in 1937.
      • Exotic particles that act as their own antiparticles.
      • Microsoft engineered them using topological conductors, making qubits more stable and resistant to errors.

    Features of Majorana 1 Chip:

    • Uses topological qubits, which require less error correction compared to traditional superconducting qubits.
    • More scalable, allowing the quantum chip to reach up to 1 million qubits in the future.
    • Built from indium arsenide-aluminum topo-conductors, unlike conventional silicon-based quantum chips.
    • Operates at near absolute zero temperature, tuned with magnetic fields to create a stable quantum environment.
    • Currently an 8-qubit chip, but designed with an architecture that supports significant expansion.

    What is Quantum Computing?

    • Quantum computing is a new approach to computation based on the principles of quantum mechanics that allows computers to process information exponentially faster than classical computers.
    • Unlike classical computers that use binary bits (0 or 1), quantum computers use qubits, which can exist in both 0 and 1 simultaneously (superposition).
    • Key Principles of Quantum Computing:
      • Superposition:  Qubits exist in multiple states at once.
      • Entanglement: –Qubits can be linked, meaning a change in one affects the other instantly.
      • Quantum Tunneling: Qubits can pass through energy barriers.
      • Quantum Interference:  Enhances correct probabilities while canceling out incorrect ones.
    • Quantum computers solve complex problems that are impossible for classical computers, such as simulating molecules, optimizing logistics, and advancing AI.

     

    PYQ:

    [2022] Which one of the following is the context in which the term “qubit” is mentioned?

    (a) Cloud Services
    (b) Quantum Computing
    (c) Visible Light Communication Technologies
    (d) Wireless Communication Technologies

     

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

    NGT Report on Ganga Water Quality

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: BOD

    Why in the News?

    The National Green Tribunal (NGT) has raised concerns over the water quality of the Ganga at Triveni Sangam in Prayagraj, Uttar Pradesh. The river is failing to meet bathing standards due to high Biological Oxygen Demand (BOD) and faecal coliform contamination.

    Key Findings of the Ganga Water Quality Assessment at Triveni Sangam:

    • Water is unsafe for bathing as per Central Pollution Control Board (CPCB) standards.
    • BOD levels exceeded the permissible limit of 3 mg/L on multiple days in January 2025.
    • Government releasing 10,000-11,000 cusecs of fresh water to improve quality.
    • Faecal coliform levels (E. coli) far exceed safe limits due to sewage contamination.
    • Safe limit: 2,500 MPN/100 ml; Detected levels: 49,000 MPN/100 ml (Ganga) and 33,000 MPN/100 ml (Yamuna).

    What is Biological Oxygen Demand (BOD)?

    • BOD measures the amount of oxygen required by bacteria to break down organic matter in water.
    • Higher BOD levels indicate higher organic pollution, which can lead to oxygen depletion and aquatic life destruction.
    • Safe limit for bathing water is below 3 mg/L.
    • Excessive BOD levels suggest sewage, industrial waste, or decomposing organic matter contamination.
    • BOD levels above safe limits can cause waterborne diseases and disrupt aquatic ecosystems.

    PYQ:

    [2017] Biological Oxygen Demand (BOD) is a standard criterion for:

    (a) Measuring oxygen levels in blood

    (b) Computing oxygen levels in forest ecosystems

    (c) Pollution assay in aquatic ecosystems

    (d) Assessing oxygen levels in high-altitude regions

     

  • Labour, Jobs and Employment – Harmonization of labour laws, gender gap, unemployment, etc.

    [pib] Periodic Labour Force Survey (PLFS) Quarterly Bulletin

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Periodic Labour Force Survey (PLFS)

    Why in the News?

    The latest edition of PLFS report (October-December 2024) has highlighted key labour market indicators.

    plfs

    About Periodic Labour Force Survey (PLFS)

    • The PLFS is conducted by the National Statistical Office (NSO), Ministry of Statistics and Programme Implementation (MoSPI) to assess employment and unemployment trends in India.
    • Launched in April 2017, PLFS provides quarterly estimates for urban areas and annual estimates for both rural and urban areas.
    • Key Indicators:
    1. Labour Force Participation Rate (LFPR): Percentage of people working or seeking jobs.
    2. Worker Population Ratio (WPR): Percentage of people employed.
    3. Unemployment Rate (UR): Percentage of job seekers unable to find employment.
    4. Current Weekly Status (CWS): Employment status based on work done in the last 7 days.
    • Survey Methodology:
      • Urban Areas: Rotational Panel Sampling (each household surveyed four times).
      • Data Collected (Oct-Dec 2024): 5,742 urban units surveyed, covering 1,70,487 individuals across 45,074 households.
      • Publication: Quarterly Bulletins for urban areas, Annual Reports for rural and urban regions.

    Key Highlights of PLFS (Oct-Dec 2024)

    • Labour Force Participation Rate (LFPR): 50.4% (↑ from 49.9% in 2023).
      • Male LFPR: 75.4% (↑ from 74.1% in 2023).
      • Female LFPR: 25.2% (↑ from 25.0% in 2023).
    • Worker Population Ratio (WPR): 47.2% (↑ from 46.6% in 2023).
      • Male WPR: 70.9% (↑ from 69.8% in 2023).
      • Female WPR: 23.2% (↑ from 22.9% in 2023).
    • Unemployment Rate (UR): 6.4% (↓ from 6.5% in 2023).
      • Male UR: 5.8% (unchanged).
      • Female UR: 8.1% (↓ from 8.6% in 2023).

    PYQ:

    [2023] Most of the unemployment in India is structural in nature. Examine the methodology adopted to compute unemployment in the country and suggest improvements.

    [2013] Disguised unemployment generally means:

    (a) large number of people remain unemployed

    (b) alternative employment is not available

    (c) marginal productivity of labour is zero

    (d) productivity of workers is low

     

  • International Space Agencies – Missions and Discoveries

    New study challenges the age of Saturn’s Rings

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Saturn’s Rings

    Why in the News?

    A new study has challenged previous assumptions, suggesting that Saturn’s rings could be as old as the Solar System (~4.5 billion years old).

    New study challenges the age of Saturn’s Rings

    About Saturn and Its Rings

    • Saturn, the sixth planet from the Sun, is famous for its iconic ring system, made up of billions of ice and rock particles ranging in size from tiny grains to massive chunks.
    • It is primarily composed of water ice (95%), with some dust and rocky debris.
    • The rings are divided into seven main sections (A to G), with gaps like the Cassini Division.
    • Scientists have debated whether the rings formed with Saturn (~4.5 billion years ago) or if they are only 100-400 million years old.
    • Over time, tiny space rocks should darken the rings, yet they remain surprisingly bright.

    Key Findings of the Study:

    • Earlier estimates, based on Cassini data, suggested the rings were 100-400 million years old because they looked clean and bright.
    • The new study suggests that micrometeoroid collisions remove dust efficiently, preventing the rings from darkening over time.
    • High-speed micrometeoroid impacts (~108,000 km/h) cause dust to vaporize, rather than accumulate.
    • The vaporized dust either escapes Saturn’s gravity, falls into the planet’s atmosphere, or gets ejected into space, keeping the rings pristine.
    • 100 million years ago, the Solar System was stable, making ring formation unlikely.
    • 4 billion years ago, the Solar System was chaotic, increasing the chances of violent planetary collisions that could have formed Saturn’s rings.

    Various Missions to Saturn

    Saturn has been explored by multiple spacecraft, each providing valuable insights into its rings, atmosphere, and moons.

    1. Pioneer 11 (1979)

    • First spacecraft to fly past Saturn, capturing basic images.

    2. Voyager 1 & Voyager 2 (1980-1981)

    • Discovered new moons and ring structures.
    • Provided detailed images of Saturn’s rings.

    3. Cassini-Huygens (1997-2017)

    • A NASA-ESA-ASI mission that orbited Saturn for 13 years.
    • Key discoveries:
      • Confirmed liquid oceans on Enceladus.
      • Found methane lakes on Titan.
      • Observed Saturn’s rings losing material into the planet’s atmosphere.

     

    PYQ:

    [2009] Which one of the following planets has largest number of natural satellites or moons?

    (a) Jupiter
    (b) Mars
    (c) Saturn
    (d) Venus

     

  • Historical and Archaeological Findings in News

    Iron Age in India

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Iron Age; Important Sites

    Why in the News?

    Tamil Nadu CM recently proclaimed that the Iron Age began on Tamil soil over 5,300 years ago (4th millennium BCE), based on findings from Mayiladumparai, Sivagalai, Adichanallur, and Kilnamandi.

    Iron Age in India

    • The Iron Age in India was initially thought to have begun around 700-600 BCE.
    • Radiocarbon dating pushed the timeline back to 1800 BCE, with evidence of iron smelting found in Central Ganga Plain and Eastern Vindhyas.
    • Recent discoveries in Tamil Nadu suggest that iron metallurgy was established in South India as early as 3300 BCE.

    Notable Iron Age Sites in India:

    1. Central and Northern India
    • Raja Nala-ka-tila (UP): Iron tools and slag found in pre-NBP (Northern Black Polished) deposits (1400–800 BCE).
    • Malhar (Chandauli, UP): Furnaces and iron slag indicate a major iron metallurgy center (1200 BCE).
    • Dadupur (UP): Large-scale iron smelting evidence dating back to 1000 BCE.
    • Hastinapur (UP): Iron tools associated with the Painted Grey Ware (PGW) culture (1000 BCE).
    • Takshashila (Punjab, Pakistan): Iron tools found in Gandhara settlements (800 BCE).
    1. Western and Central India
    • Ahar (Rajasthan): Chalcolithic culture (2500–1700 BCE) showed early evidence of iron artifacts.
    • Naikund (Vidarbha, Maharashtra): Discovery of an iron smelting furnace (1000 BCE).
    • Mahurjhari (Nagpur, Maharashtra): Horse ornaments made of copper with iron knobs (800 BCE).
    1. South India
    • Paiyampalli (Tamil Nadu): Large-scale iron smelting and slag deposits (1200 BCE).
    • Adichanallur (Tamil Nadu): Iron tools and burial urns linked to Megalithic culture (1000 BCE).
    • Mayiladumparai (Tamil Nadu): Recent findings date iron usage to 3300 BCE, making it one of the oldest sites of iron metallurgy in India.
    • Sivagalai (Tamil Nadu): Iron artifacts and slag deposits, indicating early smelting practices (1100 BCE).

    Iron Age in Tamil Nadu: New Discoveries

    • Earlier studies in Mayiladumparai Excavation (2022) suggested that the Iron Age began 4,200 years ago (3rd millennium BCE).
    • This timeline coincides with the Copper/Bronze Age in North India, indicating a technological divergence between the regions.
    • The latest State Archaeology Department’s report, “Antiquity of Iron: Recent Radiometric Dates from Tamil Nadu, confirms that Iron smelting began as early as 3,345 BCE – 2,953 BCE.
    • Limited availability of copper ores in South India might have led to the early adoption of iron technology.
    • Excavations in Sivagalai, Adichanallur, Kilnamandi, and Mayiladumparai indicate that the Iron Age in Tamil Nadu predates much of North India.

    PYQ:

    [2017] With reference to the difference between the culture of Rigvedic Aryans and Indus Valley people, which of the following statements is/are correct?

    1. Rigvedic Aryans used the coat of mail and helmet in warfare whereas the people of Indus Valley Civilization did not leave any evidence of using them.
    2. Rigvedic Aryans knew gold, silver and copper whereas Indus Valley people knew only copper and iron.
    3. Rigvedic Aryans had domesticated the horse whereas there is no evidence of Indus Valley people having been aware of this animal.

    Select the correct answer using the code given below:

    (a) 1 only

    (b) 2 and 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

     

  • Innovations in Sciences, IT, Computers, Robotics and Nanotechnology

    Nocturnal Bull Ants Navigate Using Polarized Moonlight

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Polarized Moonlight

    Why in the News?

    Scientists at Macquarie University, Sydney, have discovered that two species of nocturnal bull ants (Myrmecia pyriformis and Myrmecia midas) rely on polarised moonlight for navigation.

    Nocturnal Bull Ants Navigate Using Polarized Moonlight

    What is Polarised Moonlight?  

    • Polarised moonlight refers to moonlight that has undergone scattering in Earth’s atmosphere, causing its waves to oscillate in a specific direction.
    • Unlike direct moonlight, which is unpolarised, the light that scatters in the sky becomes linearly polarised, meaning its electric field aligns in a fixed plane.
    • The moon emits unpolarised light, but when it interacts with air molecules and dust particles in the atmosphere, it scatters and becomes polarised.
    • The intensity of polarised moonlight is much lower than polarised sunlight, making it harder for most animals to detect.
    • The pattern of polarisation in moonlight remains stable, allowing nocturnal animals to use it as a reliable navigation tool.
    • Why is it Important for Navigation?
      • Many nocturnal animals, including bull ants (Myrmecia pyriformis and Myrmecia midas), rely on celestial cues to orient themselves.
      • Unlike the moon’s direct position, which changes with phases and cloud cover, the polarisation pattern remains detectable throughout the night.
      • This enables ants to navigate effectively even under crescent or waning moons, where light intensity is significantly lower.

    E-Vector Pattern and Ant Navigation

    • Polarised moonlight forms a distinct pattern in the sky, known as the E-vector pattern.
    • This pattern shifts based on the moon’s position, but its orientation remains stable, allowing insects like ants to use it as a natural compass.
    • The E-vector pattern aligns at 90° to the moon’s direct light, creating a predictable navigation reference.
    • How do Bull Ants use it?
      • Ants detect the E-vector pattern in the night sky using their specialised compound eyes, which are sensitive to polarised light.
      • Even in dim conditions, they adjust their movements according to the orientation of polarised moonlight.
      • Researchers found that when the E-vector was artificially rotated, the ants changed their paths accordingly, confirming that they rely on this pattern.
      • When the moonlight disappeared (during a new moon phase), the ants struggled to navigate, further proving their dependence on polarised lunar light.
  • Banking Sector Reforms

    What is Deposit Insurance?

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Deposit Insurance

    Why in the News?

    The Centre is actively considering increasing the deposit insurance cover beyond the current ₹5 lakh limit, as confirmed by Financial Services Secretary.

    What is Deposit Insurance?

    • Deposit Insurance is a financial protection mechanism for depositors if a bank fails or faces restrictions imposed by the RBI.
    • It ensures compensation up to a set limit, even if the bank cannot return the money.
    • It is provided by Deposit Insurance and Credit Guarantee Corporation (DICGC), a subsidiary of RBI.
    • Coverage & Exclusions:
      • Covers: Savings accounts, fixed deposits (FDs), recurring deposits (RDs), current accounts (both principal & interest).
      • Does NOT cover: Deposits from foreign governments, central/state governments, inter-bank deposits, and primary cooperative societies.

    History of Deposit Insurance in India:

    • 1962: First in Asia to introduce Deposit Insurance Corporation (DIC), covering ₹1,500 per depositor.
    • 1978: Merged with the Credit Guarantee Corporation to form DICGC.
    • 1993: Deposit limit raised to ₹1 lakh.
    • 2020: After the PMC Bank crisis in Pune, the limit was increased from ₹1 lakh to ₹5 lakh.
    • 2021: Law amended to ensure insured payouts within 90 days of a bank facing restrictions.

    About DICGC & Its Functions

    • DICGC was established in 1961, a wholly-owned RBI subsidiary under the DICGC Act, 1961.
    • It covers all commercial banks, regional rural banks, foreign banks in India, and cooperative banks.
    • Banks pay the insurance premium; depositors do not pay any charges.
    • It ensures timely compensation within 90 days of a bank’s collapse.

    How does Deposit Insurance work?

    • DICGC insures deposits up to ₹5 lakh per depositor per bank.
    • The ₹5 lakh limit includes both principal and interest amounts.
    • If a bank is facing financial distress or RBI-imposed restrictions, depositors are eligible to claim insurance under Section 18A of the DICGC Act, 1961.
    • Payout Timeline:
      • Within 45 days: The troubled bank must submit a list of depositors to DICGC.
      • Within 90 days: DICGC processes and pays depositors up to ₹5 lakh.
    • If a bank goes into liquidation, DICGC pays the insured amount within two months of receiving a claim list from the bank’s liquidator.
    • When RBI restricts withdrawals from a bank, depositors are eligible to receive their insured deposits.

    PYQ:

    [2013] Which of the following grants/grant direct credit assistance to rural households? (2013)

    1. Regional Rural Banks
    2. National Bank for Agriculture and Rural Development
    3. Land Development Banks

    Select the correct answer using the codes given below:

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

     

  • Indian Army Updates

    Exercise Dharma Guardian

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Exercise Dharma Guardian

    Why in the News?

    India and Japan are set to commence the 6th edition of the Dharma Guardian military exercise at Mount Fuji.

    Other India-Japan Military Exercises

    • JIMEX (Japan-India Maritime Exercise): Naval cooperation between the Indian Navy and Japan Maritime Self-Defense Force (JMSDF).
    • Veer Guardian: Joint air force exercise between the Indian Air Force (IAF) and Japan Air Self-Defense Force (JASDF).
    • Malabar Exercise: Japan participates along with India, the US, and Australia (Quad nations) in this high-level naval exercise.

    About Exercise Dharma Guardian

    • It is an annual joint military exercise between the Indian Army and Japan Ground Self-Defense Force (JGSDF), conducted alternatively in India and Japan.
    • It was commenced in 2018
    • The 6th edition will be held from February 25 to March 9, 2025, at Mount Fuji, Japan.
    • 120 Indian soldiers from the Madras Regiment will participate, focusing on urban warfare and counter-terrorism operations.
    • Key Features:
      • Joint Counter-Terrorism Training: Focus on urban and semi-desert warfare.
      • Advanced Tactical Drills: Close-quarters combat, live fire, and battlefield medical evacuation.
      • 48-hour Validation Exercise: Tests real-time combat coordination.
      • Cultural and Professional Exchange: Strengthens India-Japan military ties.

    Significance:

    • Strengthens Strategic Ties: Expands India-Japan defence cooperation under the Indo-Pacific framework.
    • Enhances Regional Security: Aligns with Quad nations’ vision (India, Japan, US, Australia).
    • Boosts Defence Technology Collaboration: Includes co-development of Unicorn Stealth Antenna System.
    • Improves Military Readiness: Supports joint UN peacekeeping and disaster response operations.
  • Global Geological And Climatic Events

    Delhi Earthquake

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Delhi Earthquake and its causes

    Why in the News?

    A magnitude 4 earthquake struck New Delhi with epicentre near Dhaula Kuan. The quake was shallow (5 km depth), highlighting Delhi’s seismic vulnerability due to its location in Zone IV of India’s earthquake hazard map.

    Possible Causes of the Earthquake

    • Tectonic Activity along the Delhi-Hardwar Ridge:
      • Delhi sits on the Delhi-Hardwar Ridge, an active seismic fault.
      • Continuous collision of the Indian and Eurasian plates builds tectonic stress, leading to earthquakes when stress is released.
    • Groundwater Extraction as a Seismic Trigger: Excessive exploitation alters rock pressure, potentially inducing fault movements.
    • Anthropogenic (Human-Induced) Activity:
      • Urbanization, metro construction, and large-scale infrastructure projects alter subsurface stress.
      • Vibrations from construction activities can contribute to localized seismic instability.

    About the Aravalli-Delhi Fold Belt

    • The Aravalli-Delhi Fold Belt is a major geological formation that extends from southern Rajasthan to Haryana and Delhi.
      • It consists of ancient folded rock formations that have undergone millions of years of geological transformation.
    • This region has several pre-existing faults, meaning seismic activity can occur without direct tectonic subduction.
    • Although historically more active, tectonic movements in the belt have slowed over time.
    • These earthquakes occur due to fault reactivation and local stress accumulation rather than large-scale tectonic shifts.
      • Himalayan earthquakes are caused by subduction, where the Indian plate moves under the Eurasian plate.

    PYQ:

    [2021] Discuss about the vulnerability of India to earthquake related hazards. Give examples including the salient features of major disasters caused by earthquakes in different parts of India during the last three decades.

    [2015] The frequency of earthquakes appears to have increased in the Indian subcontinent. However, India’s preparedness for mitigating their impact has significant gaps. Discuss various aspects.

     

  • Wildlife Conservation Efforts

    What is the Aravalli Safari Park Project?

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Aravalli Range

    Why in the News?

    The Haryana government has proposed an ambitious 3,858-hectare Aravalli Safari Park spread across Gurugram and Nuh, which aims to be the world’s largest safari park.

    About the Aravalli Range

    • The Aravalli Range is one of the oldest fold mountain ranges in the world, dating back to the Proterozoic era.
    • It stretches 692 km from Gujarat to Delhi, passing through Rajasthan and Haryana.
    • The range acts as a natural green barrier, preventing the expansion of the Thar Desert into eastern Rajasthan and the Gangetic plains.
    • Highest Peak: Guru Shikhar (1,722 meters) in Mount Abu, Rajasthan.
    • Rivers originating from the Aravalli Range:
      • Banas and Sahibi Rivers (tributaries of the Yamuna).
      • Luni River, which flows into the Rann of Kutch.
    • Rich in mineral resources, including copper, zinc, lead, and marble.
    • The Aravalli hills play a critical role in groundwater recharge, acting as natural aquifers.
    • 80% of the range is in Rajasthan, while the rest is in Haryana, Delhi, and Gujarat.

    What is the Aravalli Safari Park Project?

    • The Haryana government has proposed a 3,858-hectare Aravalli Safari Park, intended to be the world’s largest.
    • The project covers 2,574 hectares in Gurugram and 1,284 hectares in Nuh.
    • It will include animal enclosures, botanical gardens, aquariums, cable cars, hotels, and an animal hospital.
    • Initially managed by the Tourism Department, the project is now under the Forest Department, with an expert committee overseeing its execution.

    Why is there Opposition?

    • Ecological Concerns: The Aravallis prevent desertification, and large-scale construction could disrupt groundwater recharge and biodiversity.
    • Threat to Water Security: The region acts as an aquifer, and excessive tourism, vehicular traffic, and construction could worsen Gurugram and Nuh’s water crisis, already classified as “over-exploited” by the Central Ground Water Board.
    • Legal Violations: The project falls under protected forest areas, governed by:
      • Forest Conservation Act, 1980.
      • Punjab Land Preservation Act (PLPA), 1900, restricting deforestation.
      • T.N. Godavarman Thirumulpad Judgment (1996), which extends legal protection to non-notified forest land.

    PYQ:

    [2011] The Himalayan Range is very rich in species diversity. Which one among the following is the most appropriate reason for this Phenomenon?

    (a) It has a high rainfall that supports luxuriant vegetative growth

    (b) It is a confluence of different bio-geographical zones.

    (c) Exotic and invasive species have not been introduced in this region.

    (d) It has less human interference.