Prelims · Mains · Interview · one free reference
UPSC Preparation Hub
A source-linked reference built for UPSC Civil Services aspirants — every GS paper, previous-year questions, NCERT summaries, Mains answer-writing and interview preparation, gathered in one place and cross-checked against the official syllabus.
Start with the subject libraryYour preparation sequence
How to use this hub: each subject below has its own dedicated reference page with structured tables, key facts and source links, built around the UPSC Civil Services syllabus. Use the quiz to test your recall after reading, and always cross-verify against the official syllabus at upsc.gov.in.
GS-1 · GS-2 · GS-3 · GS-4
Choose your subject area
Click any card to open the full reference page for that subject.
Geography of India
Physical features, rivers, climate zones, soils, minerals, and political geography — one of the highest-weightage Prelims topics.
Modern History (1757–1947)
British colonial rule, the freedom struggle, landmark Acts of the British Parliament, key movements and their leaders.
Science & Technology
Space programme (ISRO), nuclear policy, defence R&D (DRDO), biotechnology, IT sector, and key scientific institutions.
Environment & Ecology
Biodiversity hotspots, national parks, tiger reserves, international conventions (Ramsar, CITES, Paris Agreement), climate policy.
Art & Culture
Classical dance forms, music traditions, painting schools, sculpture, architecture, UNESCO Intangible Heritage, and major festivals.
Indian Polity & Constitution
Preamble, Fundamental Rights, DPSP, Parliament, Judiciary, Emergency provisions, Constitutional bodies, landmark SC judgements, and key Amendments.
Government Schemes
All major central government welfare and development schemes — launch year, nodal ministry, objective, and current status.
Indian Economy
GDP concepts, banking system, monetary & fiscal policy, inflation, GST, poverty, HDI, agriculture, financial markets, and key economic schemes.
Ancient & Medieval History
IVC sites, Vedic age, Mahajanapadas, Mauryas, Guptas, Delhi Sultanate, Mughal Empire, Bhakti Movement, Maratha Empire — comprehensive coverage.
World Geography
Continents, oceans, ocean currents, plate tectonics, climate zones, world rivers, straits, mountain ranges, deserts, lakes, and international boundaries.
Indian Society
Caste system, tribal communities, women & gender, communalism, secularism, regionalism, urbanisation, poverty, social movements and demographics.
International Relations
India's foreign policy doctrines, neighbourhood relations, bilateral ties (USA, China, Russia), multilateral organisations, nuclear policy, and diaspora.
Ethics, Integrity & Aptitude
GS Paper 4 complete coverage — ethical theories, public service values, emotional intelligence, Gandhi's ethics, case-study approach, key quotes.
Internal Security & Disaster Management
Terrorism, LWE/Naxalism, NE insurgency, cybersecurity, border management, NDMA, disaster types, Sendai Framework — complete GS-3 security coverage.
Governance & Social Justice
RTI, e-governance, Civil Services, Panchayati Raj, urban governance, accountability mechanisms, reservation policy, social welfare, regulatory bodies.
World History
Industrial Revolution, French Revolution, WWI, WWII, Cold War, Decolonisation, Chinese Revolution, Post-Cold War world — complete GS-1 coverage.
Practise with real questions
Previous Year Questions
Year-wise questions from actual UPSC exam papers — Prelims and Mains both covered.
Prelims PYQ (2011–2024)
Selected questions year-wise from UPSC Prelims GS Paper 1 — organised by topic (History, Geography, Polity, Economy, Environment, S&T) with answers and frequency analysis.
Mains PYQ (2013–2024)
Year-wise questions from all GS Papers (GS-1, GS-2, GS-3, GS-4) and Essay — with topic-wise frequency analysis, answer-writing strategy and a 12-month study schedule.
Gap-filling modules
Deep-dive reference pages
Areas critical for a complete UPSC preparation — Post-Independence India, CSAT, Agriculture, Interview, Political Parties, and Rapid Revision.
Post-Independence India
Five-Year Plans, Princely State integration, Emergency 1975–77, 1991 Economic Reforms, constitutional amendments, landmark SC judgements, complete PM table.
CSAT Paper 2 — Complete Prep
Reading Comprehension, Logical Reasoning, Basic Numeracy, Data Interpretation, Decision Making — with practice questions, solutions, and time management.
Indian Agriculture — Deep Dive
Crop seasons, land reforms, irrigation systems, Green Revolution, MSP/FCI architecture, major schemes (PM-KISAN, PMFBY, e-NAM), allied sectors.
Political Parties of India
National & state parties, major alliances (NDA/INDIA), Anti-Defection Law, electoral reforms, electoral bonds, and the ONOE debate.
Rapid Revision — Master Cheat Sheet
Last-week power revision for all 4 GS papers + Essay: articles, key cases, geography facts, economy numbers, conventions, ethics thinkers, quotes and mnemonics.
One page, everything
Complete deep-reference pages
Laxmikanth & Spectrum-level comprehensive references — free, in one page each.
Indian Polity — Complete Reference
Preamble, Citizenship, Fundamental Rights, DPSPs, Parliament, President, Judiciary, Constitutional Bodies, Emergency Provisions, all 12 Schedules, key Amendments.
Modern History — Complete Reference
1498 to 1947: European arrival, British conquest, Revenue systems, 1857 Revolt, Social Reform movements, all INC phases, Constitutional Acts, Partition.
Foundation first
NCERT summaries — Class 6 to 12
Chapter-by-chapter NCERT summaries with PYQ tags, tables and key facts — replaces reading 20+ textbooks.
NCERT History
Stone Age to Modern India: IVC, Vedic Age, Mauryas, Guptas, Delhi Sultanate, Mughals, 1857 Revolt, National Movement, World/European History.
NCERT Geography
Physical World to Human Geography: plate tectonics, atmosphere, monsoon, ocean currents, biomes, India's physiography, rivers, soils, minerals, population.
NCERT Polity & Economy
Democracy, Federalism, Fundamental Rights, DPSPs, Parliament, Judiciary — and Poverty, Sectors of Economy, Money, Budget, Five Year Plans, LPG Reforms.
Turn knowledge into marks
Mains answer writing & ethics
Master the art of writing high-scoring Mains answers — with model answers, templates, and full GS-4 case studies.
Mains Answer Writing — Complete Guide
Directive word guide, universal answer template, time management, 8 full model answers across GS-1/2/3, GS-4 ethics question and case study, essay structure.
Ethics Case Studies — GS Paper 4
10 detailed case studies with full model answers: corruption, transfers, conflict of interest, disaster triage, tribal displacement, whistleblowing.
Stage 3 · 275 marks
Interview (Personality Test) preparation
DAF strategy, common interview questions, and a structured plan for the final stage.
Content compiled from NCERT textbooks (Geography, History, Science), PIB, MoEFCC, ISRO and Ministry websites. PYQ compiled from public-domain UPSC papers. Always cross-verify with the official syllabus at upsc.gov.in.