This is an original, topic-wise digest of the durable static general knowledge a CAPF aspirant must hold, modelled on the coverage of Lucent General Knowledge but written in our own words. Lucent is a recall reference, not a learning text; its value is as a single place to revise the miscellaneous, high-frequency facts that fall between the NCERT subject silos. The approved source policy treats Lucent as a supplementary reference (see sources index); for any claim, the underlying primary source (Constitution, Census, ISRO, sports federation) is the authority.
Use this digest for the cross-cutting "GK" that Paper I and the interview reward: superlatives, firsts, awards, abbreviations, organisations, and the static facts of India that do not sit cleanly in history, geography, polity, economy or science. Subject-deep facts stay in their own modules; this page links out to them.
Lucent is for the second and third revision rounds, not the first read. Treat each section as a recall list: cover the answer, recall the fact, move on. Do not read it like a textbook. The CAPF-calibration target is recognition of the single correct fact, not explanation. For year-sensitive entries (current office-holders, latest census figures, latest indices, sports champions), verify the latest from a primary source; this digest gives the durable structure, not the perishable value.
- Geographical extent: India lies between roughly 8° 4 minutes and 37° 6 minutes North latitude and 68° 7 minutes to 97° 25 minutes East longitude. The Tropic of Cancer (about 23.5° North) passes through eight States.
- The Standard Meridian of India is 82° 30 minutes East, passing near Mirzapur (Uttar Pradesh); Indian Standard Time is 5 hours 30 minutes ahead of Greenwich Mean Time.
- India is the seventh-largest country by area and (verify the latest) the most populous. Total land area about 3.28 million square kilometre.
- The mainland coastline is about 6,100 kilometre (over 7,500 kilometre including island territories). India shares land borders with seven neighbours (the Radcliffe and other lines); fuller treatment in india borders neighbours and strategic geography.
- National symbols: national flag (Tiranga, adopted 22 July 1947, the Ashoka Chakra with 24 spokes), national emblem (the Lion Capital of Ashoka from Sarnath, with the motto Satyameva Jayate), national anthem (Jana Gana Mana, Tagore), national song (Vande Mataram, Bankim Chandra Chatterjee), national animal (tiger), national bird (peacock), national flower (lotus), national tree (banyan), national fruit (mango), national river (Ganga), national aquatic animal (river dolphin).
- Largest, longest, highest within India: longest river (Ganga), highest peak (Kanchenjunga, the highest peak in India, on the India-Nepal border; Nanda Devi is the highest peak lying entirely within India; K2 is higher still but in territory claimed by India and administered by Pakistan), highest waterfall (Kunchikal), largest State by area (Rajasthan), smallest State by area (Goa), largest district and so on. See the geography module for the physiography detail in india physiography.
- The Constituent Assembly first met on 9 December 1946; the Constitution was adopted on 26 November 1949 and came into force on 26 January 1950. Drafting Committee chaired by Dr B. R. Ambedkar. It took about 2 years, 11 months and 18 days.
- The original Constitution had 395 Articles, 22 Parts and 8 Schedules; it now has more Articles, 25 Parts and 12 Schedules (verify current count after recent amendments).
- Borrowed features: Parliamentary system and rule of law (United Kingdom), Fundamental Rights and judicial review (United States), Directive Principles (Ireland), the federal scheme with a strong Centre and emergency provisions (Government of India Act 1935 and others), Fundamental Duties and the five-year plan idea (former Soviet Union), Concurrent List (Australia).
- The Preamble describes India as a Sovereign, Socialist, Secular, Democratic Republic ("Socialist" and "Secular" added by the 42nd Amendment, 1976).
- Quick recall of the schedules and key Articles is the highest-yield Lucent-style polity content; the full treatment is in Index and the human-rights and internal-security angle in human rights and internal security.
- Indus Valley Civilisation: major sites and their finds (Mohenjo-daro and the Great Bath, Harappa, Lothal and the dockyard, Dholavira, Kalibangan). Detail in indus valley civilisation.
- Dynasties and their founders, capitals and famous rulers (Maurya, Gupta, Chola, Delhi Sultanate, Mughal). The freedom struggle sequence (sessions of the Indian National Congress, the major movements, key Acts) is the densest exam zone; see Index and towards independence acts and partition.
- Important battles and dates (First Battle of Panipat 1526, Plassey 1757, Buxar 1764), and the Governors-General and Viceroys with their reforms.
- Continents, oceans, and superlatives: largest continent (Asia), largest ocean (Pacific), longest river in the world (Nile, with the Amazon contesting by some measures), highest mountain (Everest), largest desert (Sahara among hot deserts; Antarctica is the largest cold desert), largest country (Russia).
- Important lines and circles: Equator, Tropics, Arctic and Antarctic Circles, Prime Meridian, the International Date Line. Local and important time differences.
- Straits, canals and chokepoints (Suez, Panama, Malacca, Hormuz, Bab-el-Mandeb): see straits chokepoints and strategic waterways. World physical and political detail in world physical geography and world political geography.
- The Reserve Bank of India was established in 1935 and nationalised in 1949; it is India's central bank and monetary authority. Quick facts on banking, currency and the budget cycle live in money and banking and the rbi.
- Planning history: the Planning Commission (1950) was replaced by NITI Aayog (1 January 2015). Five-Year Plans and their headline themes; see planning and niti aayog.
- Recurring static economy GK: types of taxes (direct versus indirect, GST from 1 July 2017), stock exchanges (BSE the oldest in Asia, NSE), and key indices. Verify latest rates and figures.
- Scientific instruments and their uses, inventions and their inventors, and SI units sit in the science module; see science everyday phenomena and quick facts and the ncert general science digest.
- Space and defence: ISRO (founded 1969, headquarters Bengaluru), major launch vehicles (PSLV, GSLV, LVM3), landmark missions (Chandrayaan, Mangalyaan, Gaganyaan in progress), and DRDO missiles. This is the CAPF defence angle: see space and defence technology.
- Branches of science and the study terms (for example, the study of birds is ornithology, of insects entomology, of soil pedology).
- Civilian honours in order: Bharat Ratna (highest), Padma Vibhushan, Padma Bhushan, Padma Shri. Gallantry awards in peace and wartime: the Param Vir Chakra (highest wartime), Maha Vir Chakra, Vir Chakra; and the Ashoka Chakra, Kirti Chakra, Shaurya Chakra (peacetime). This gallantry-award hierarchy is high-value for the CAPF interview.
- Major international and national prizes (Nobel, the Bharat Ratna recipients, Jnanpith for literature, Dadasaheb Phalke for cinema, the Bharat Ratna and Padma lists). Do not memorise the latest year's winners as fixed; verify the latest.
- Classical dances and their States (Bharatanatyam, Tamil Nadu; Kathakali and Mohiniyattam, Kerala; Kathak, North India; Kuchipudi, Andhra Pradesh; Odissi, Odisha; Manipuri, Manipur; Sattriya, Assam). UNESCO World Heritage Sites in India (verify the current count). Major festivals, dances and folk forms by region.
- United Nations (founded 24 October 1945, headquarters New York) and its principal organs and specialised agencies with headquarters: WHO (Geneva), UNESCO (Paris), ILO (Geneva), FAO (Rome), IMF and the World Bank (Washington DC), the International Court of Justice (The Hague).
- Other bodies and their seats: Interpol (Lyon), the International Committee of the Red Cross (Geneva, relevant to the human-rights syllabus), OPEC (Vienna), ASEAN (Jakarta), SAARC (Kathmandu), the BRICS New Development Bank (Shanghai).
- Indian organisations and their founding years and seats (ISRO, DRDO, the CAPFs themselves). For the forces, see the five forces and the security module.
- Number of players, the governing body, and the cup or trophy for each major sport (cricket, hockey India's traditional strength, football, kabaddi, the national sport debate). Olympic, Asian Games and Commonwealth Games basics.
- Terms associated with each game (love and deuce in tennis, bull's eye in archery and shooting, googly in cricket). Do not fix the latest champions; verify the latest medal tallies and winners.
- Common abbreviations across governance, science, defence and economy (the full forms of agency and scheme acronyms are recurring single-fact questions).
- "Firsts" of India (first President, first Prime Minister, first woman President, first Indian in space Rakesh Sharma 1984, first Indian Nobel laureate Rabindranath Tagore 1913). Treat office-holder firsts as static; treat current office-holders as year-sensitive and verify the latest.
- Books and authors, and important days and their themes (verify current themes, which change).
The Lucent layer is pure recall, and CAPF rewards it generously in the miscellaneous slots of Paper I and across the interview table. But it is a revision tool, not a primary source: learn the concept from the subject module first, then use this digest to lock the static fact. Spend the bulk of effort on the high-yield blocks (national symbols, gallantry awards, organisations and headquarters, polity recall facts, the freedom-struggle sequence, and the space and defence facts), and skim the rest. For where this sits in the full reading plan, see how to use the canon.
- Lucent General Knowledge (the reference whose coverage this digest mirrors, in our own words).
- Underlying primary sources for each block: the Constitution of India, Census of India, ISRO and DRDO, the United Nations, the relevant Acts and government notifications. Source policy at sources index.