UPSC Prelims 2026 Science & Technology Revision — Day 6: Space, Nuclear & AI

Time needed: 3–4 hours  |  High-yield rating: ⭐⭐⭐⭐⭐ (10–15 questions per paper)

ISRO — Space Missions

Chandrayaan Series

Prelims trap: Chandrayaan-3 landed near (not exactly at) the geographic south pole — described as "south polar region." The mission proved the presence of sulphur on the lunar south pole surface (in-situ confirmation for first time).

Aditya-L1 (Solar Mission)

• Launch: September 2, 2023 (PSLV-C57), Sriharikota
• Destination: Sun-Earth L1 Lagrange point halo orbit — reached January 6, 2024
• India's first solar observatory; world's first solar observatory at L1 from a developing country
• Instruments: VELC (Visible Emission Line Coronagraph — IIAP), SUIT, PAPA, SoLEXS, HEL1OS, ASPEX, MAG (7 payloads)
• Purpose: Study solar corona, solar winds, CMEs (Coronal Mass Ejections), space weather

XPoSat (X-ray Polarimeter Satellite)

• Launch: January 1, 2024 (PSLV-C58), Sriharikota
• India's first dedicated X-ray polarimetry mission and world's second (after NASA's IXPE, 2021)
• Studies X-ray polarisation from black holes, neutron stars, pulsars

RLV (Reusable Launch Vehicle) — "Pushpak"

• RLV-LEX-02: March 22, 2024; Aeronautical Test Range (ATR), Chitradurga, Karnataka (Chalakere taluk)
• Tests autonomous landing capability — crucial for future reusable rockets
• India developing RLV to drastically reduce launch costs (like SpaceX Falcon 9)

Gaganyaan (Human Spaceflight)

• Vyommitras: Female humanoid space robot to fly on uncrewed Gaganyaan flights
• Astronaut trainees: Prashanth Balakrishnan Nair, Angad Pratap, Ajit Krishnan, Shubhanshu Shukla (selected; training in Russia, India)

Prelims trap: Gaganyaan's crewed mission is targeted for 2027, not 2025 or 2026. G1 uncrewed orbital flight was delayed and is now planned for 2026.

ISRO Launch Vehicles — Comparison Table

Key difference: LVM3 uses India's indigenous cryogenic engine (CE-20); GSLV Mk2 used a Russian-supplied cryogenic upper stage. LVM3 is India's heaviest rocket and handles commercial launches.

Other ISRO Missions

Prelims trap: SPADEX (December 2024) made India the 4th country to demonstrate space docking — a key technology for future space stations and lunar missions.

Defence & Strategic

Missiles

Aircraft & Naval

• INS Vikrant: India's first domestically built aircraft carrier; commissioned September 2, 2022 (Kochi); designed by Warship Design Bureau; 45,000 tonnes; STOBAR system (Short Take-Off But Arrested Recovery)
  • Air wing: Up to 30 aircraft — MiG-29K fighters (12 planned), MH-60R multi-role helicopters, Kamov Ka-31 (AEW), Advanced Light Helicopter (ALH/Dhruv); LCA Navy Mk1 under development for future carrier ops
  • Rafale-M: India signed deal (April 2025) for 26 Rafale Marine jets (22 single-seat + 4 twin-seat, ~₹63,000 crore) — will eventually replace MiG-29K on INS Vikrant
• LCA Tejas Mk1A: 83 aircraft ordered (Feb 2021 contract); deliveries underway; upgraded avionics, AESA radar, IRST
• LCA Tejas Mk2: In development (DRDO/HAL); larger, heavier; GE-414 engine planned
• AMCA (Advanced Medium Combat Aircraft): 5th-gen stealth fighter; DRDO development; design phase
• INS Arighaat: India's 2nd SSBN; commissioned August 29, 2024
• INS Aridhaman: India's 3rd SSBN; commissioned April 3, 2026

Prelims trap: India has 3 operational SSBNs (as of May 2026): INS Arihant (2016), INS Arighaat (Aug 2024), INS Aridhaman (April 2026).

Nuclear Energy

Prelims trap: PFBR achieved criticality on April 6, 2026 — not yet in commercial operation. Once commercial, India will be the second country after Russia to operate a commercial FBR (Russia's BN-800 at 880 MWe has been commercial since 2016; PFBR is 500 MWe). Operated by BHAVINI under DAE.

India's Civilian Nuclear Deals

India has bilateral civil nuclear cooperation agreements with 14 countries. Key agreements:

Prelims trap: The India-USA nuclear deal is called the "123 Agreement" (Section 123 of US Atomic Energy Act 1954). India is the only NPT non-signatory with nuclear weapons that has received an NSG waiver for civilian nuclear trade.

Biotechnology & Life Sciences

GM Crops & GEAC

• Bt cotton (2002): Only commercially approved transgenic GM crop in India; Cry protein from Bacillus thuringiensis kills bollworm
• Bt brinjal: Moratorium since 2010 (Environment Minister Jairam Ramesh); India is centre of brinjal diversity — biodiversity concern
• Golden Rice: Not approved in India; engineered for beta-carotene (Vitamin A precursor)
• Genome editing (CRISPR) — 2022 regulation change: SDN-1 and SDN-2 (no foreign DNA inserted) exempt from strict GMO rules under MoEF&CC notification (March 2022); SDN-3 (inserts foreign DNA) still requires full GEAC approval
• GEAC (Genetic Engineering Appraisal Committee): Under MoEFCC (not Ministry of Agriculture); apex body for GM organism approval

Prelims trap: GEAC is under MoEFCC, not the Agriculture Ministry. Bt cotton was approved in 2002 — not 2000 or 2003.

GM Mustard (HT Mustard DMH-11)

• What it is: Dhara Mustard Hybrid-11 (DMH-11) — herbicide-tolerant (HT) GM mustard developed by Delhi University (Prof. Deepak Pental); uses barnase/barstar/bar gene system
• GEAC approval: October 18 and 25, 2022 — GEAC recommended environmental release for seed production and testing
• Supreme Court: Issued stay on commercial release; matter came before a 2-judge bench which delivered a split verdict (Justice Nagarathna found GEAC approval procedurally flawed; Justice Karol upheld the approval with safeguards)
• Status (2025): No commercial cultivation — Supreme Court directed government to frame comprehensive national policy on GM crops; field trials continuing under court-supervised protocols
• Significance: If eventually approved, would be India's second GM crop after Bt cotton, and first food crop GM variety

Prelims trap: GEAC approved DMH-11 in October 2022 but the Supreme Court stayed commercial release. As of 2025, GM mustard is NOT commercially cultivated in India.

CRISPR-Cas9

• Discovery: Jennifer Doudna (UC Berkeley) + Emmanuelle Charpentier (Germany) — Nobel Prize in Chemistry 2020
• Cas9 protein: From Streptococcus pyogenes; guided by gRNA to cut DNA at specific sequences
• Applications: Gene therapy, crop improvement, pest control (gene drives), diagnostics
• Controversy: Designer babies (He Jiankui case, China, 2018 — sentenced); germline editing ethics

Biological Diversity Act 2002

• Purpose: India's domestic legislation implementing the UN Convention on Biological Diversity (CBD) (to which India is a party); protects biological resources and ensures equitable benefit-sharing
• Three-tier institutional structure:

• People's Biodiversity Registers (PBRs): Prepared by BMCs in consultation with local communities; document all available and traditional knowledge of local biological resources and their uses; key legal document establishing rights of local people
• Nagoya Protocol: International framework under CBD for Access and Benefit Sharing (ABS); India ratified 2012

Prelims trap: NBA is headquartered in Chennai (not Delhi or Pune). NBA is under MoEFCC — the same ministry that houses GEAC. BMCs are constituted at every local body level, not just gram panchayats — also urban local bodies.

Vaccines & Pharma

• Covaxin: India's indigenous COVID vaccine (Bharat Biotech + ICMR); inactivated whole virion
• Covishield: AstraZeneca-Oxford vaccine; manufactured by Serum Institute of India (SII)
• mRNA vaccines: Pfizer-BioNTech, Moderna — first large-scale mRNA vaccines; India's mRNA program (HDT Biotech, CSIR collaboration)
• Jan Aushadhi Scheme: Generic medicines at 50–90% lower cost; 14,000+ PM Janaushadhi Kendras

Digital India & IT

Prelims trap: The DPDP Act 2023 is India's first standalone personal data protection law — the Personal Data Protection Bill 2019 was withdrawn. DPDP is the current law.

Prelims trap (NPCI): NPCI (National Payments Corporation of India) is NOT a government body — it is a not-for-profit company incorporated under Section 8 of the Companies Act, owned by a consortium of banks (RBI + Indian Banks' Association promoted). NPCI operates UPI, RuPay card network, IMPS, FASTag (NETC), BBPS (Bharat Bill Payment System), and AePS (Aadhaar-enabled Payment System).

Prelims trap (IndiaAI Mission): The IndiaAI Mission was approved in March 2024 (NOT January 2024). Outlay: ₹10,372 crore over 5 years.

Prelims trap (CERT-In): CERT-In's 6-hour reporting window applies to virtually all organisations operating digital infrastructure in India — no size or sector exemption. CERT-In is under MeitY (not Home Ministry or NSCS).

Space (International)

Key Science Concepts (Prelims-Tested)

Physics

• Superconductivity: Zero electrical resistance below critical temperature; MRI machines, maglev trains use superconductors
• Quantum Computing: Uses qubits (superposition + entanglement); IBM, Google, India's National Quantum Mission (₹6,003 crore, 2023-24 to 2030-31 — 8 years; approved Cabinet April 19, 2023)
• LiDAR: Light Detection and Ranging; laser pulses; used in autonomous vehicles, archaeology (discovered Maya cities in Mexico), terrain mapping
• Dark Matter/Dark Energy: Dark matter ~27%, dark energy ~68%, ordinary matter ~5% of universe (WMAP/Planck data)

Chemistry & Materials

• Graphene: Single layer of carbon atoms (honeycomb lattice); Nobel Physics 2010 (Geim + Novoselov); strongest material known; excellent conductor
• Aerogel: Lightest solid; 99.98% air; excellent thermal insulator; used in space missions
• Perovskites: Solar cell material with rapidly improving efficiency; flexible; potential replacement for silicon

Biology

• One Health concept: Intersection of human health, animal health, environment; zoonotic disease prevention; WHO/FAO/WOAH collaboration
• mRNA: Messenger RNA carries genetic instructions from DNA to ribosomes; basis of COVID mRNA vaccines; also cancer vaccine trials underway
• Microbiome: Trillions of microorganisms in gut; linked to immunity, mental health, obesity
• Antibiotic resistance: AMR = one of top global health threats; ESKAPE pathogens; India's National Action Plan on AMR (2017-2021, extended)

Health Technology — Digital Health

Prelims trap: The PM-JAY 70+ expansion (September 2024) is income-independent — even wealthy senior citizens aged 70+ are eligible. This is a significant change from the original income-based eligibility. The ABDM is a framework; ABHA is the specific health ID number within it.

Key Scientific Institutions — India

Prelims trap (CSIR): CSIR has 37 national labs — frequently asked. BARC is in Mumbai (Trombay), not Delhi. DRDO HQ is Delhi but has labs across India (Hyderabad — DRDL for missiles; Pune — ARDE for armaments).

2025–26 Current Affairs: Science & Technology

ISRO Space Missions — 2025–26

Prelims trap: SpaDeX docking happened on January 16, 2025 (launched December 30, 2024). India is the 4th country to demonstrate space docking — not the 3rd or 5th. The other three: USA (1966), USSR/Russia (1967), China (2011).

Prelims trap: NISAR was launched on July 30, 2025 aboard an Indian GSLV rocket (not PSLV or LVM3). It is the first satellite where both NASA and ISRO co-developed hardware — NASA provided the L-band radar; ISRO provided the S-band radar and spacecraft bus.

Prelims trap: The Bharatiya Antariksh Station (BAS) target completion is 2035, with the first module (BAS-1) planned for 2028. India's crewed lunar landing target is 2040 — distinct from the BAS completion year.

NavIC — Status and Challenge (2025–26)

Prelims trap: NavIC (Navigation with Indian Constellation) = India's regional navigation system; covers India and up to 1,500 km beyond its borders. Full name: Indian Regional Navigation Satellite System (IRNSS). The NVS series are second-generation with indigenous rubidium atomic clocks and added L1 band (GPS-compatible).

Nuclear Energy — PFBR Milestone

Prelims trap: PFBR achieved criticality on April 6, 2026 — it is NOT yet in commercial operation (grid connection and power generation target: late 2026). Once commercial, India becomes only the second country after Russia to operate a commercial fast breeder reactor. PFBR is built by BHAVINI, not NPCIL.

Defence & Strategic — 2025–26

Prelims trap: India's defence exports in FY 2025–26 were ₹38,424 crore — the all-time record. For comparison: FY 2023–24 was ~₹21,083 crore; FY 2024–25 was ₹23,622 crore. The target set under the Defence Production and Export Promotion Policy (DPEPP 2020) is ₹50,000 crore by 2029.

Prelims trap: India has 3 SSBNs as of May 2026. SSBN = Ship Submersible Ballistic Nuclear = nuclear-powered submarine carrying nuclear ballistic missiles. These are central to India's nuclear triad (land + air + sea). SSBN is different from SSN (attack submarine, no nuclear missiles).

Digital India & Semiconductor — 2025–26

Prelims trap: India's first semiconductor fabrication plant (Tata, Dholera) was notified as part of an SEZ on April 16, 2026 — this is a Fab (wafer fabrication), not just an assembly plant. The Assam facility is an OSAT (Outsourced Semiconductor Assembly and Test) — different from a full Fab. India's semiconductor mission was approved by Cabinet on February 29, 2024 (not 2023).

Prelims trap: The National Quantum Mission (NQM) was approved by Cabinet on April 19, 2023 with outlay ₹6,003.65 crore over 8 years. Four Technology Hubs: IISc Bengaluru (quantum computing), IIT Madras (quantum communication), IIT Delhi (quantum sensing), IIT Bombay (quantum materials). The 1,000 km QKD milestone was achieved by QNu Labs using indigenous technology.

Health Technology & Biomedical

TB Elimination Programme

• India's target: Eliminate TB by 2025 — 5 years ahead of the global SDG target of 2030 (National Strategic Plan 2017-2025; National TB Elimination Programme / NTEP)
• Global burden: India accounts for ~25% of global TB cases
• Progress: TB incidence reduced ~17.7% from 2015 to 2023 (from 237 to 195 cases per lakh population)
• PM TB Mukt Bharat Abhiyaan: Launched September 9, 2022; community involvement; Ni-Kshay Mitras (supporters) pledge nutritional support
• Nikshay Poshan Yojana (NPY): Cash transfer for TB patients' nutrition — currently ₹1,000/month (increased from ₹500; Direct Benefit Transfer); over ₹3,202 crore disbursed to 1.13 crore beneficiaries
• Ni-Kshay Mitra: 2.59 lakh+ Mitras registered; 1.18 crore commitments

Malaria Elimination

• India's target: Interrupt indigenous malaria transmission by 2027 (National Strategic Plan for Malaria Elimination 2023–2027); achieve zero indigenous cases; national elimination by 2030
• Progress: Malaria cases reduced ~80% from 2015 to 2023; on track to meet WHO GTS goal of 75% reduction by 2025
• District milestone: By end of 2025, 160 districts in 23 states/UTs reported zero indigenous cases over 2022–2024

Vaccines — Key Indigenous Developments

CERVAVAC (HPV Vaccine — Serum Institute of India):

• India's first indigenously developed quadrivalent HPV vaccine — targets HPV types 6, 11, 16, and 18
• Developed by Serum Institute of India (SII); DCGI approved for market circulation in 2022–23
• Gender-neutral: Indicated for girls/women aged 9–26 years; also approved for boys/men
• Dosage: 2-dose schedule (ages 9–14); 3-dose schedule (ages 15–26)
• Significance: Indigenously developed; substantially lower cost than imported HPV vaccines; enables government programme scale-up

Note on price: CERVAVAC's public-programme procurement price is substantially lower than imported HPV vaccines (Gardasil, Cervarix); government procurement drives affordability — the ₹200/dose figure circulated in media represents aspirational bulk-procurement pricing for government immunisation programmes.

Covaxin (BBV152):

• India's first indigenous COVID-19 vaccine; developed by Bharat Biotech in collaboration with ICMR/NIV (National Institute of Virology, Pune)
• Platform: Whole virion inactivated (SARS-CoV-2 + Alhydroxiquim-II adjuvant)
• DCGI Emergency Use Authorisation (EUA): January 3, 2021
• Phase 3 efficacy: 77.8% against symptomatic COVID-19 (published in The Lancet, Nov 2021)
• WHO Emergency Use Listing (EUL): Granted November 3, 2021

Prelims trap: India's TB elimination target is 2025 (national target) — NOT 2030 (that's the global SDG target). Malaria target: interrupt transmission by 2027, eliminate by 2030. CERVAVAC is quadrivalent (HPV 6, 11, 16, 18) — NOT bivalent; protects against both cancer-causing types (16, 18) AND genital wart-causing types (6, 11). Covaxin EUA was granted January 3, 2021; WHO EUL was November 3, 2021 — two separate approvals. Nikshay Poshan is now ₹1,000/month (doubled from original ₹500).

Cybersecurity — Key Institutions & Laws

CERT-In — Key Rules (2022):

• Direction issued April 28, 2022; effective June 28, 2022
• 6-hour mandatory reporting of 20 specified cyber incident types to CERT-In
• 180-day log retention within India (all ICT infrastructure)
• System clock synchronisation with NTP servers traceable to NTP(NPLI) or NTSC
• Non-compliance: Criminal liability up to 1 year imprisonment under IT Act

National Cybersecurity Policy:

• India's NCSP 2013 was the first version; NCSP 2020 draft was prepared but not notified
• No standalone comprehensive national cybersecurity policy (NCSP) is in force as of 2026 — cybersecurity governance is through CERT-In Directions, IT Act 2000, DPDP Act 2023, and sectoral regulators

Prelims trap: CERT-In is under MeitY — NOT under Home Ministry or NSC. NCCC is under Home Ministry — NOT MeitY. This distinction is a classic Prelims MCQ trap. CERT-In is the incident response body; NCCC is the intelligence coordination body. The 6-hour reporting rule applies to virtually all organisations — no size or sector exemption.

Space Technology — Additional Facts

ISRO's Commercial Architecture

NewSpace India Limited (NSIL):

• Incorporated: March 2019 (announced in Union Budget 2019)
• Type: Central Public Sector Enterprise (CPSE) under Department of Space (DoS)
• Role: Current primary commercial arm of ISRO; handles technology transfer to industry, productionisation of launch vehicles (PSLV, SSLV), commercial satellite services
• Key activities: Managed OneWeb launches (LVM3), GSAT satellite leasing, SSLV transfer to private sector (HAL + IIL consortium)

Antrix Corporation (Earlier commercial arm):

• Founded 1992; handled ISRO's commercial business for 30 years
• Being wound down for large commercial activities following the Devas controversy (2011; Devas-Antrix deal cancelled by government; ICC arbitration awards against India running into hundreds of millions of dollars)
• NSIL now handles large commercial contracts; Antrix retained for some legacy activities

IN-SPACe (Indian National Space Promotion and Authorisation Centre):

• Established: Announced June 2020 (Cabinet approval); operational from 2022
• Type: Autonomous single-window nodal agency under Department of Space (DoS)
• HQ: Bopal, Ahmedabad, Gujarat
• Role: Authorises and supervises space activities of Non-Governmental Entities (NGEs/private sector); promotes private participation in space; single-window clearance
• First private launch authorised: Vikram-S (Skyroot Aerospace), November 18, 2022

OneWeb Launches by ISRO (LVM3)

• Oct 2022: LVM3-M2 — 36 OneWeb LEO broadband satellites; ISRO's first commercial mission on LVM3
• Mar 2023: LVM3-M3 — 36 more OneWeb satellites
• OneWeb: UK-based LEO broadband internet constellation (owned by Eutelsat since 2023); demonstrated commercial viability of LVM3

SSLV — Operational Status

• SSLV-D3 (3rd & final developmental flight): August 16, 2024; Sriharikota; successfully placed EOS-08 and SR-0 DEMOSAT-2 in orbit
• SSLV declared operational after D3 success; technology transferred to private sector
• Production handed to: HAL + IIL (India Intermediaries Ltd) consortium for commercial production
• Payload capacity: Up to 500 kg to LEO / 300 kg to SSO; designed for small satellites

Prelims trap: NSIL ≠ Antrix. NSIL (2019) is the current primary commercial arm; Antrix (1992) is being wound down. IN-SPACe authorises private launch and satellite activities — it is a regulatory-cum-promotion body, not a launch agency. IN-SPACe is under DoS (Department of Space), HQ at Ahmedabad. SSLV completed development with D3 in August 2024 — now fully operational for commercial use.

Scientific Institutions — Expanded Reference

Department of Atomic Energy (DAE) Institutions

IGCAR vs BHAVINI (Kalpakkam): IGCAR designed the PFBR; BHAVINI built and operates it. Both are at Kalpakkam but are distinct institutions.

Ministry of Earth Sciences (MoES) — Polar Research

NCPOR (National Centre for Polar and Ocean Research):

• Location: Vasco da Gama, Goa
• Under: Ministry of Earth Sciences (MoES)
• Role: India's nodal agency for polar and ocean research; manages Indian Antarctic and Arctic expeditions

India's Research Stations:

India has TWO operational Antarctic stations (Maitri + Bharati) and ONE Arctic station (Himadri, Svalbard). Dakshin Gangotri is no longer an active research base.

Agriculture & Medical Research Bodies

Science & Technology Governance

• DST (Department of Science and Technology): Nodal ministry for S&T policy; under Ministry of Science and Technology
• SERB (Science and Engineering Research Board): Statutory body under DST; funds fundamental research through grants (SRG, CRG, SCP etc.)
• PM-STIAC (PM's Science, Technology, and Innovation Advisory Council): Advises PM on S&T policy; chaired by Principal Scientific Adviser (PSA) to GoI; currently Dr. Ajay Kumar Sood
• CSIR (Council of Scientific and Industrial Research): Under Ministry of Science & Technology; 37 national laboratories; covers pharma (CDRI), genomics (CCMB), polymers (CECRI), chemicals (NCL)

Prelims trap: BARC is in Mumbai (Trombay) — NOT Kalpakkam or Delhi. Kalpakkam has IGCAR (design) and BHAVINI (operation). India has TWO active Antarctic research stations (Maitri + Bharati) — NOT one and NOT three (Dakshin Gangotri is decommissioned as research base). India has ONE Arctic station — Himadri at Ny-Ålesund, Svalbard (Norway) — NOT in Greenland or Canada. ICMR was founded in 1911 — making it one of the oldest medical research councils in the world. NCPOR (Goa) is under MoES, not ISRO or DST.

Diseases, Vectors & Transmission

3–5 questions per paper on this topic. Memorise vector + parasite + disease + endemic zone for each.

Vector-Disease Master Table

Prelims trap: The Kala-azar sandfly is Phlebotomus argentipes (Indian subcontinent-specific species) — not just "Phlebotomus" generically. Xenopsylla cheopis is the vector for both plague AND murine typhus — distinguish by disease (plague = Yersinia pestis; murine typhus = Rickettsia typhi). Scrub typhus is caused by Orientia tsutsugamushi — technically NOT Rickettsia genus, though it belongs to the same order (Rickettsiales). Nipah is NOT vector-borne; transmission is through bats → humans (via fruit/date palm sap) → human-to-human (close contact).

Prelims trap: P. vivax causes nearly two-thirds of malaria cases in India — but P. falciparum causes most deaths (more dangerous). India's malaria targets: interrupt transmission by 2027; national elimination by 2030 (NMESP 2023–2027). These are two separate milestones.

Prelims trap: JENVAC is the Indian JE vaccine made by Bharat Biotech from an Indian (Kolar) JE strain — distinct from SA-14-14-2 live attenuated vaccine (Chinese) or IXIARO (Valneva, inactivated). JE vaccine is given in the UIP only in endemic districts, not universally.

Vaccines — Types and India's UIP

Vaccine Technology Types

India's Universal Immunisation Programme (UIP) — Current Vaccine Schedule

The UIP (under NHM/MoHFW) provides free vaccination against 12 vaccine-preventable diseases nationally (JE sub-nationally in endemic districts).

Prelims trap: The Pentavalent vaccine contains 5-in-1: DPT + Hepatitis B + Hib — it replaced three separate injections. Hib (Haemophilus influenzae type b) is a conjugate vaccine component — protects against bacterial meningitis and pneumonia in infants. PCV (conjugate) is distinct from pneumococcal polysaccharide vaccine (PPV-23; for adults — NOT in UIP).

Prelims trap (HPV): India's national HPV vaccination programme was launched February 28, 2026 — targeting girls aged 9–14 (2-dose schedule). The vaccine used is quadrivalent (HPV 6, 11, 16, 18). CERVAVAC (Serum Institute of India's indigenous quadrivalent HPV vaccine) is expected to supply the UIP but was not yet WHO-prequalified as of early 2026.

Key Individual Vaccines — Rapid Facts

ZyCoV-D (Zydus Cadila):

• World's first DNA vaccine approved for humans (plasmid DNA platform)
• DCGI Emergency Use Authorization: August 20, 2021
• Needle-free administration: PharmaJet Tropis intradermal injector
• 3 doses (Day 0, Day 28, Day 56); no needle = lower hesitancy, safer for needle-phobic
• Efficacy: 66.6% against symptomatic COVID-19 (Phase 3 interim); 100% against moderate-severe disease
• Approved for ages 12+ (first COVID vaccine for adolescents 12–18 in India)

Covaxin (BBV152, Bharat Biotech + ICMR):

• Platform: Whole virion inactivated SARS-CoV-2 + Alhydroxiquim-II adjuvant
• DCGI EUA: January 3, 2021
• Phase 3 efficacy (The Lancet, 2021): 77.8% against symptomatic COVID-19; 93.4% against severe disease
• WHO Emergency Use Listing (EUL): November 3, 2021

CERVAVAC (Serum Institute of India):

• India's first indigenously developed HPV vaccine
• Quadrivalent — targets HPV types 6, 11, 16, 18 (same types as Gardasil)
• DCGI market authorisation: 2022–23
• 2-dose schedule for ages 9–14; 3-dose schedule for ages 15–26
• Gender-neutral: indicated for girls/women AND boys/men
• Substantially lower cost than imported HPV vaccines; enables government scale-up

Prelims trap: ZyCoV-D EUA = August 20, 2021; Covaxin EUA = January 3, 2021; WHO EUL for Covaxin = November 3, 2021 — three distinct dates, each testable. ZyCoV-D is not mRNA — it is DNA (plasmid). mRNA vaccines (Pfizer, Moderna) were never approved in India's EPI. CERVAVAC is quadrivalent (protects against 4 HPV types) — not bivalent (which would only cover 16 and 18).

Antimicrobial Resistance (AMR)

Key Facts

ESKAPE Pathogens

The acronym covers 6 multidrug-resistant organisms responsible for the majority of hospital-acquired (nosocomial) infections worldwide:

Prelims trap: India's NAP-AMR 2017–2021 period has lapsed — a follow-on plan is under development. The colistin ban was 2019 (not 2017 or 2021). The WHO 2024 Priority Pathogens List has 24 pathogens — not the same as the 2017 list (12 pathogens). The ESKAPE acronym spells out six organisms — note that "E" appears twice (Enterococcus AND Enterobacter).

Basic Physics & Chemistry — Prelims-Tested Concepts

Physics Concepts

Superconductivity:

• Definition: Zero electrical resistance below a critical temperature (T_c); material becomes a perfect conductor
• Meissner Effect: Expulsion of magnetic field from the interior of a superconductor when it transitions below T_c (superconductor becomes a perfect diamagnet)
• BCS Theory: Bardeen-Cooper-Schrieffer theory (1957); explains superconductivity via Cooper pairs (electron pairs coupled by lattice vibrations/phonons); Nobel Prize in Physics 1972 (Bardeen, Cooper, Schrieffer — note: Bardeen won his second Nobel Prize here, becoming the only person to win two Nobel Prizes in the same field)
• Applications: MRI machines, maglev trains (magnetic levitation), particle accelerators (LHC at CERN), quantum computers

Semiconductors:

• Conductivity between conductors and insulators; silicon (Si) and germanium (Ge) are elemental semiconductors
• n-type doping (adds extra electrons): Group V donor impurities — phosphorus (P), arsenic (As), antimony; majority carriers = electrons
• p-type doping (creates holes): Group III acceptor impurities — boron (B), gallium (Ga), aluminium; majority carriers = holes
• p-n junction = diode: allows current in one direction; basis of transistors, solar cells, LEDs

Optical Fibre:

• Principle: Total Internal Reflection — light travels along the fibre core by reflecting off the core-cladding boundary at angles greater than the critical angle
• Structure: core (higher refractive index) + cladding (lower refractive index, ~1% difference); both usually glass (silica)
• Advantages: immune to electromagnetic interference (EMI); very high bandwidth; low signal loss over long distances; lighter than copper cables
• Used in: telecommunications backbone, undersea cables, medical endoscopes

LiDAR (Light Detection and Ranging):

• Emits laser pulses; measures time for reflected light to return → calculates distance/3D mapping
• Applications: autonomous vehicles (obstacle detection), archaeology (discovered 60,000+ Maya structures in Guatemala under canopy, 2018), topographic mapping, forestry, space missions
• Space use: NASA uses LiDAR for lunar landing navigation; Chandrayaan-2's lander used a Laser Altimeter for descent hazard detection

RADAR (Radio Detection And Ranging):

• Uses radio waves (longer wavelength than light); can penetrate clouds and darkness
• Uses: weather forecasting, air traffic control, defence (missile tracking), speed measurement (Doppler RADAR shifts frequency with target velocity)
• SAR (Synthetic Aperture Radar): ground-imaging radar from satellites; all-weather, day/night; used in NISAR, EOS-09 (RISAT-1B), Sentinel

SONAR (Sound Navigation And Ranging):

• Uses sound waves underwater (electromagnetic waves don't travel well in water)
• Active SONAR: emits a sound pulse; listens for echo; locates objects (submarines, schools of fish); reveals own position to adversary — tactical disadvantage
• Passive SONAR: only listens; does not emit; submarines prefer passive SONAR for stealth
• Uses: submarine warfare, underwater mapping, fish-finding, nautical charting

Nuclear Fission vs Fusion:

ITER (International Thermonuclear Experimental Reactor):

• Located at Cadarache, France; world's largest fusion experiment
• Members: USA, EU, India, China, Japan, Russia, South Korea (7 parties)
• India joined ITER as full partner in December 2005
• Plasma experiments expected ~2034; full D-T fusion operations ~2039

India's Fusion Research — Tokamaks:

• SST-1 (Steady State Superconducting Tokamak-1): at Institute for Plasma Research (IPR), Gandhinagar, Gujarat; medium-sized; superconducting magnets; achieves plasma confinement; experimental (not for electricity generation)
• SST-2 / SST-Bharat: Next-generation tokamak under design at IPR; will incorporate D-T plasma, Test Blanket Module; aimed at demonstrating electricity generation; long-term goal: demo fusion power reactor by 2060

Prelims trap: BCS theory Nobel Prize was 1972 (not 1957 — 1957 is when the theory was published). The Meissner effect is the expulsion of magnetic field from a superconductor — distinct from zero resistance. ITER is in France (Cadarache) — India is a member, not a host. SST-1 is at IPR, Gandhinagar — NOT Kalpakkam or Mumbai. Active SONAR emits sound; Passive SONAR only listens. RADAR uses radio waves; LiDAR uses laser (light) pulses; SONAR uses sound waves — a common MCQ comparison.

Semiconductor Policy — India

Semicon India Programme (Overall Framework)

• Cabinet approved: December 2021 (initially); expanded/operationalised 2022
• Total outlay: ₹76,000 crore for development of semiconductor and display manufacturing ecosystem
• Fiscal support: 50% for semiconductor fabs; 50% for display fabs; 50% for compound semiconductors/OSAT units
• Nodal agency: India Semiconductor Mission (ISM) under MeitY; current CEO: Amitesh Kumar Sinha (Additional Secretary, MeitY; reappointed April 2025)

Three Cabinet-Approved Semiconductor Plants (February 29, 2024)

Micron Technology (Separately announced 2023)

• Micron Technology (US): Semiconductor Assembly and Test facility at Sanand Industrial Park, Gujarat
• Total investment: $2.75 billion (combined Micron + government; GoI provides 50% fiscal support; Gujarat provides 20%)
• DRAM and NAND memory chip packaging; Phase 1 operational by late 2024
• Creates ~5,000 direct Micron jobs + 15,000 community jobs
• Inaugurated March 2026 — India's first operational commercial semiconductor assembly facility

Prelims trap: The Tata Dholera facility is a Fab (wafer fabrication — the most complex, high-investment part of chip making); the Assam and Sanand facilities are OSAT/ATMP (assembly and test — downstream). Fab ≠ OSAT. The Semicon India Programme outlay is ₹76,000 crore (total scheme), not ₹91,000 crore (which is only the Dholera fab project cost). ISM CEO: Amitesh Kumar Sinha (Additional Secretary, MeitY).

AI/ML — India's AI Policy & Global AI Governance

IndiaAI Mission

AI Governance — India

• DPDP Act 2023 (Digital Personal Data Protection Act): India's primary data governance law; has implications for AI-generated and AI-processed personal data; Data Protection Board to adjudicate
• No standalone AI legislation enacted in India as of 2026
• MeitY AI Governance Guidelines (November 2025): Advisory/voluntary framework; not a law
• IT Rules amended (February 2026): Mandatory labelling of AI-generated content (deepfakes, synthetic media)

Global AI Governance Milestones

Prelims trap: IndiaAI Mission was approved March 7, 2024 — NOT January or February 2024. Outlay: ₹10,372 crore (memorise the exact figure). The EU AI Act entered into force August 1, 2024 — but full enforcement of most provisions is August 2026 (phased rollout). Bletchley Declaration = November 2023 (UK); Seoul Summit = May 2024 (South Korea). India has no AI Act — only advisory guidelines and amended IT Rules.

Space — Gaps Frequently Tested (Verified)

Artemis Accords — India's Signing

• What they are: A set of practical bilateral agreements between the United States (NASA/State Dept) and partner nations on principles for responsible civil space exploration. They are NOT a treaty — they are politically binding executive agreements, not legally binding treaties under international law
• Established: October 13, 2020, by NASA and seven initial signatories (Australia, Canada, Italy, Japan, Luxembourg, UAE, UK)
• India signed: June 21, 2023 — during PM Modi's state visit to Washington D.C. India became the 27th signatory at the time of signing
• Core principles: Peaceful purposes; transparency; interoperability; emergency assistance; space object registration; release of scientific data; preserving heritage; avoiding orbital debris; avoiding harmful interference
• NOT related to: Artemis programme crewed Moon missions directly — countries sign Accords for cooperation norms, not necessarily to fly astronauts on Artemis missions

Prelims trap: India signed Artemis Accords on June 21, 2023 — NOT 2022 or 2024. Artemis Accords are NOT a treaty — they are executive agreements; no Senate/parliamentary ratification required. They are separate from the Outer Space Treaty 1967 (which India IS a signatory to).

India's Private Space Sector — Key Milestones

The private space enablement framework:

Prelims trap: Vikram-S (Skyroot) was India's first-ever private rocket to launch — November 18, 2022. Agnibaan SOrTeD (Agnikul) was the world's first rocket with a single-piece 3D-printed semi-cryogenic engine — May 30, 2024. IN-SPACe HQ is in Ahmedabad (Bopal), NOT Bengaluru or Delhi. IN-SPACe authorised the first private launch (Vikram-S) — proof of the framework working.

Nuclear — Key Gaps Covered

India and the NSG — Current Status

• NSG (Nuclear Suppliers Group): Formed in 1974 (after India's Pokhran-I test exposed gap in Non-Proliferation Treaty safeguards); 48 participating governments; controls export of nuclear materials, equipment, and technology
• India's NSG waiver — 2008: On September 6, 2008, NSG granted India a special waiver from its full-scope safeguards requirement, enabling civilian nuclear trade with India despite India not being an NPT signatory; triggered by the 2005 India-US civilian nuclear agreement (PM Manmohan Singh + President George W. Bush)
• India's NSG membership application: India formally applied for NSG membership in 2016; as of 2026, India is still NOT a member of the NSG
• China's block: China has consistently opposed India's membership (citing that NSG requires NPT membership; India is not an NPT signatory and has nuclear weapons)
• Significance of 2008 waiver: India is the only nuclear-armed country outside the NPT to have received a civilian nuclear trade waiver from NSG — a unique strategic achievement

Prelims trap: India is NOT an NSG member — it has only a 2008 waiver. A waiver ≠ membership. India applied for membership in 2016 but is blocked primarily by China. NSG was formed in 1974 (not 1968 when NPT was opened for signature).

IAEA Additional Protocol — India

• India-IAEA Safeguards Agreement: Signed February 2, 2009; applied safeguards to India's civilian nuclear facilities (not all — military facilities excluded)
• India's Additional Protocol (AP): Signed May 15, 2009; entered into force July 25, 2014 (after India deposited the instrument of ratification)
• Nature: India's AP is "India-specific" — different from NPT state AP agreements; covers only declared civilian facilities; India retains unsafeguarded (military) facilities
• India is NOT an NPT signatory — its safeguards are facility-specific under the 2008 India-US deal framework

Prelims trap: India's IAEA Additional Protocol entered into force on July 25, 2014 (signed 2009, force 2014 — the gap is testable). It is NOT a full-scope safeguards agreement — only covers civilian facilities. India is one of only three nuclear-armed states outside the NPT (India, Pakistan, Israel) with item-specific IAEA safeguards.

India's Thorium Reserves — Critical Facts

• India's thorium reserves: Approximately 846,000 tonnes (as assessed by Atomic Minerals Directorate, AMD); India has the world's largest thorium reserves — estimates range from ~25–30% of global reserves
• Source mineral: Monazite sand — found in coastal beach placer deposits; Kerala coast has world's richest monazite deposits (Palakkad and Kollam districts); also found in Tamil Nadu, Andhra, Odisha coasts
• Why it matters: Thorium is the feedstock for India's Stage 3 of the Three-Stage Nuclear Programme — Thorium-232 is converted to Uranium-233 in Stage 2 FBRs, then U-233 powers Stage 3 Advanced Heavy Water Reactors (AHWRs); India's massive thorium reserves are the long-term energy security rationale
• Three-Stage Nuclear Programme (verified):
  • Stage 1: PHWRs (Pressurised Heavy Water Reactors) using natural uranium fuel → produce Plutonium-239 as by-product
  • Stage 2: FBRs (Fast Breeder Reactors) using Pu-239 + thorium blanket → breeds more Pu-239 AND converts Th-232 → U-233; PFBR at Kalpakkam = Stage 2 beginning
  • Stage 3: AHWRs (Advanced Heavy Water Reactors) using U-233 from Stage 2 + thorium → closes the thorium fuel cycle; India self-sufficient in nuclear fuel

Prelims trap: India has the world's largest thorium reserves — NOT the 2nd or 3rd largest. This is frequently stated incorrectly as "3rd largest" in some sources; the AMD assessment places India at No. 1. The thorium is in monazite sands along Kerala's coast — NOT uranium ore deposits. Uranium deposits are separately found in Jharkhand (Jaduguda) and Rajasthan.