All 8 questions from UPSC Civil Services Mains Geography 2025 Paper I (400 marks total). Every stem reproduced in full, with directive-word analysis, marks, word limits, and answer-approach pointers.
Answer the following in about 150 words each:
(a) Explain the causes of glacial lake outburst flood. (10 marks)
(b) What is solifluction? What are its impacts? (10 marks)
(c) What geological and tectonic processes lead to the formation of nappes in orogenic belts? (10 marks)
(d) Explain the relationship between air masses and local winds. (10 marks)
(e) What are the fundamental differences among ocean wave, ocean current and tide? (10 marks)
हिंदी में पढ़ें
निम्नलिखित में से प्रत्येक का लगभग 150 शब्दों में उत्तर दीजिए :
(a) हिमनद झील विस्फोट से बाढ़ के कारणों की व्याख्या कीजिए। (10 अंक)
(b) मुदासरण क्या है? इसके प्रभाव क्या हैं? (10 अंक)
(c) पर्वतीय पेटियों में प्रीवाखण्ड निर्माण में अपरद भूभिक एवं विवर्तनिक प्रक्रियाएँ क्या हैं? (10 अंक)
(d) वायुराशियों एवं स्थानीय पवनों में संबंध की व्याख्या कीजिए। (10 अंक)
(e) समुद्री लहर, समुद्री जलधारा एवं ज्वार-भाटा में आधारभूत अंतर क्या हैं? (10 अंक)
Answer approach & key points
Framework: Concept or mechanism > Diagram > Regional example > Application. (a) explain: definition/context > points in order > small example > short close | (b) define: precise definition > the distinguishing feature > one example | (c) explain: definition/context > points in order > small example > short close | (d) explain: definition/context > points in order > small example > short close | (e) compare: paired headings or table > key differences > significance > conclusion Full marks: Clear causal chain, labelled diagram, specific regional example, and application to human consequences.
(a) How does denudation chronology help in understanding the sequential development of landscapes and landforms? Elucidate. (20 marks)
(b) What is deep-sea mining? What are the potential benefits and risks associated with it? (15 marks)
(c) Man and wildlife conflicts are ever increasing. Discuss its causes, consequences and remedies. (15 marks)
हिंदी में पढ़ें
(a) भूदृश्यों एवं स्थलाकृतियों के क्रमिक विकास को समझने में अनाच्छादन कालानुक्रम किस प्रकार सहायक है? स्पष्ट कीजिए। (20 अंक)
(b) गहरे समुद्र में खनन क्या है? इससे संबंधित संभाव्य लाभ एवं खतरे क्या हैं? (15 अंक)
(c) मनुष्य एवं वन्यजीव संघर्ष निरंतर बढ़ते जा रहे हैं। इसके कारणों, परिणामों एवं सुधारों पर चर्चा कीजिए। (15 अंक)
Answer approach & key points
Framework: Concept or mechanism > Diagram > Regional example > Application. (a) explain: definition/context > points in order > small example > short close | (b) explain: definition/context > points in order > small example > short close | (c) discuss: intro > 3-4 dimensions > example > balanced close Full marks: Comprehensive mechanism, precise examples, balanced assessment, and clear diagrams.
Denudation chronology defined as ordering of erosion surfaces/generations; landscape as palimpsest
Davisian cycle (youth-maturity-old age) with rejuvenation; Penck's slope replacement
King's pediplanation and etchplanation (Wayland and Büdel)
Examples: Western Ghats escarpments, Nilgiri/Mysore plateaus; polycyclic relief; morphometric and absolute dating (cosmogenic nuclides/OSL)
Deep-sea mining defined; three deposit types (nodules, sulphides, cobalt crusts)
ISA under UNCLOS regulates the Area; Mining Code still under negotiation; India's CIOB nodule and Indian Ocean ridge sulphide contracts; Deep Ocean Mission
(a) Examine the formation of atmospheric tricellular circulation system. Describe with example its importance in making the Earth a living planet. (20 marks)
(b) What is the 'UN Decade on Ecosystem Restoration'? How does it balance ecological goals with emerging socio-economic needs like food security and development? (15 marks)
(c) "The Himalaya is still rising." Expand this statement and describe the processes involved in it with suitable sketches and examples. (15 marks)
हिंदी में पढ़ें
(a) वायुमण्डल की त्रिकोशिकीय परिसंचरण प्रणाली के निर्माण का परीक्षण कीजिए। पृथ्वी को एक जीवित ग्रह बनाने में इसके महत्व का सौदाहरण वर्णन कीजिए। (20 अंक)
(b) 'पारिस्थितिक तंत्र पुनर्स्थापनी संयुक्त राष्ट्र दशक' क्या है? यह कैसे पारिस्थितिकीय लक्ष्यों को खाद्य सुरक्षा और विकास जैसी उभरती सामाजिक-आर्थिक जरूरतों के साथ संतुलित करता है? (15 अंक)
(c) "हिमालय अभी भी ऊँचा हो रहा है।" उपयुक्त चित्रों एवं उदाहरणों के माध्यम से इस कथन का विस्तार कीजिए तथा इसमें प्रयुक्त प्रक्रियाओं का वर्णन कीजिए। (15 अंक)
Answer approach & key points
Framework: Concept > Diagram > Regional Example > Application. (a) examine: intro > how/why with reasoning > evidence > conclusion | (b) explain: definition/context > points in order > small example > short close | (c) describe: define > structure or process in order > labelled diagram > significance Full marks: Precise mechanisms, labelled diagrams, and specific regional examples for all parts.
Ferrel cell: indirect 30–60° cell with westerlies and poleward moisture; Polar cell with polar easterlies
Role of Coriolis force and pressure-belt formation
Habitability importance: heat redistribution, ITCZ seasonal migration and monsoons (India, rice/groundwater), rainforests, westerlies/ACC, polar air masses and sea ice
UN Decade on Ecosystem Restoration (2021–2030) defined; alignment with UNCCD LDN and Kunming-Montreal GBF (30% restoration, 30×30); ~1 billion ha commitments
Mechanisms: Bonn Challenge (India's 26 Mha pledge), national commitments, Great Green Wall, landscape restoration (forests, wetlands, soils, agriculture)
50MexamineDeforestation, energy balance, coastal geomorphology
(a) What are the ecological consequences of agricultural deforestation in the Amazon and Congo Basins, particularly concerning biodiversity and climate regulation? (20 marks)
(b) Examine the distribution and balance of energy in the Earth's atmosphere system. (15 marks)
(c) Describe the process of formation of barrier islands and explain their significance. (15 marks)
हिंदी में पढ़ें
(a) अमेज़न एवं कांगो बेसिन में कृषि के लिए वनों की कटाई के पारिस्थितिकीय परिणाम, विशेष रूप से जैव विविधता एवं जलवायु नियमन चिंताओं को ध्यान में रखते हुए, क्या हैं? (20 अंक)
(b) पृथ्वी की वायुमंडल प्रणाली में ऊर्जा के वितरण एवं संतुलन का परीक्षण कीजिए। (15 अंक)
(c) बाधा द्वीपों की निर्माण प्रक्रिया का वर्णन कीजिए तथा इनके महत्व की व्याख्या कीजिए। (15 अंक)
Answer approach & key points
Framework: Concept or mechanism > Diagram > Regional example > Application. (a) discuss: intro > 3-4 dimensions > example > balanced close | (b) examine: intro > how/why with reasoning > evidence > conclusion | (c) describe: define > structure or process in order > labelled diagram > significance Full marks: Mechanism-first approach with diagrams and specific regional examples.
Evapotranspiration and biogenic aerosols weakened ('flying rivers'), rainfall decline; Lovejoy & Nobre (2018) 20–25% tipping point → savannization risk
Congo: smallholder agriculture/logging roads; Cuvette Centrale peatlands (~30 Gt C) at risk; sink-to-source shift
Contrast between basins noted; REDD+ enforcement and Bonn Challenge restoration as responses
Earth-atmosphere system as open thermodynamic engine: shortwave in, longwave out
Latitudinal imbalance: surplus equator to ~38°, deficit poleward; meridional transport by Hadley/Ferrel/Polar cells and ocean currents (sensible/latent heat)
Albedo ~0.30 (≈30 reflected, 23 absorbed in atmosphere, 47 at surface per 100 units); greenhouse absorption/re-radiation → mean surface ~15°C
CERES-observed positive Earth Energy Imbalance (~1 W/m², roughly doubled since mid-2000s); ~90% of excess heat stored in oceans
Answer the following in about 150 words each:
(a) Why did the Welfare Approach in Human Geography emerge as a significant perspective in 1970s? (10 marks)
(b) What are the key environmental and economic challenges linked to the extraction and processing of critical minerals? (10 marks)
(c) "Pull factors in internal migration are often based on perceptions rather than reality." Explain. (10 marks)
(d) "Regional imbalances are the product of in situ and ex situ factors." Elucidate it with examples. (10 marks)
(e) Why is systems analysis important in urban planning and what are its limitations? (10 marks)
हिंदी में पढ़ें
निम्नलिखित में से प्रत्येक का लगभग 150 शब्दों में उत्तर दीजिए :
(a) मानव भूगोल में कल्याणकारी उपागम 1970 के दशक में एक महत्त्वपूर्ण दृष्टिकोण के रूप में क्यों उभरा? (10 अंक)
(b) महत्त्वपूर्ण (क्रिटिकल) खनिजों की निकासी एवं प्रसंस्करण से संबंधित मुख्य पर्यावरणीय एवं आर्थिक चुनौतियाँ क्या हैं? (10 अंक)
(c) "आंतरिक प्रवासन में अपकर्ष (पुल) कारक अक्सर धारणाओं पर आधारित होते हैं वास्तविकता पर नहीं।" व्याख्या कीजिए। (10 अंक)
(d) "प्रादेशिक असंतुलन यथास्थान एवं बहिस्थान कारकों के परिणाम हैं।" इसे उदाहरणों के साथ स्पष्ट कीजिए। (10 अंक)
(e) नगरीय नियोजन में तंत्र विश्लेषण क्यों महत्त्वपूर्ण है और इसकी सीमाएँ क्या हैं? (10 अंक)
Answer approach & key points
Framework: Concept or mechanism > Diagram > Regional example > Application. (a) account for: state the phenomenon > the causes in order of weight > conclusion | (b) highlight: name the salient points > one line of substance each > close | (c) explain: definition/context > points in order > small example > short close | (d) explain: definition/context > points in order > small example > short close | (e) critically evaluate: positives > negatives/limits > conditions/safeguards > conclusion Full marks: Clear causal chain, precise examples, and critical analysis.
Critique of the Quantitative Revolution's positivist/mechanistic spatial modelling
Catalysts: social relevance movement, civil rights protests; shift to social justice
D.M. Smith's 'who gets what, where and how'; welfare geography and social indicators
David Harvey's radical turn; replacement of value-free positivism by normative perspectives
Environmental: landscape degradation, biodiversity loss, water depletion (Lithium Triangle brine)
50MdescribeGeographical thought, cultural geography, agricultural geography
(a) How have dichotomy and dualism affected the methodological development of Geography? Describe. (20 marks)
(b) Analyze the role of language and religion in delineating major cultural regions of the world. (15 marks)
(c) Analyze the spatial patterns and regional specialization of plantation crops across tropical and subtropical regions. (15 marks)
हिंदी में पढ़ें
(a) क्षेत्रीकरण एवं द्वैतवाद ने भूगोल के पद्धतिगत विकास को कैसे प्रभावित किया? वर्णन कीजिए। (20 अंक)
(b) विश्व के प्रमुख सांस्कृतिक प्रदेशों के परिसीमन में भाषा एवं धर्म की भूमिका का विस्लेषण कीजिए। (15 अंक)
(c) उष्णकटिबंधीय एवं उपोष्णकटिबंधीय क्षेत्रों में बागवानी फसलों के स्थानिक प्रतिरूपों एवं प्रादेशिक विशेषता का विस्लेषण कीजिए। (15 अंक)
Answer approach & key points
(a) describe: define > structure or process in order > labelled diagram > significance | (b) analyse: intro > causes > effects > stakeholders/linkages > way forward | (c) analyse: intro > causes > effects > stakeholders/linkages > way forward Full marks: Comprehensive, well-structured, with diagrams and specific examples.
Dichotomy (physical vs human geography split) and dualism (competing epistemologies) defined
Varenius: Geographia Generalis vs Specialis; determinism (Ratzel, Semple) vs possibilism (Vidal de la Blache, Febvre)
Idiographic (Hettner, Hartshorne) vs nomothetic debate; Schaefer's challenge and the Quantitative Revolution
Later dualisms: humanistic, radical/Marxist, behavioural; trend to post-modern synthesis
Language families as delineators (Indo-European, Sino-Tibetan, Afro-Asiatic, Niger-Congo, Austronesian) with regions
Religious realms: Islamic Crescent, Indic, East Asian (Confucian/Taoist/Buddhist), Occidental (Christianity)
Interaction: reinforcing (Arabic–Islam; Latin/Cyrillic–Catholic/Orthodox) or cross-cutting (Indonesia, Punjab); transition zones (Southeast Asia, Sahel)
50Mcritically evaluateEnergy security, urban geography, population geography
(a) Why is oil important for energy security? What is the role of oil in clean energy transition? (20 marks)
(b) Critically evaluate the role of primate cities in dominating the urban spheres of influence in developing countries. (15 marks)
(c) "The global demographic landscape is evolving with rapid population growth in some places and rapid ageing in others." Elucidate with examples. (15 marks)
हिंदी में पढ़ें
(a) तेल, ऊर्जा सुरक्षा के लिए क्यों महत्वपूर्ण है? स्वच्छ ऊर्जा संक्रमण में तेल की क्या भूमिका है? (20 अंक)
(b) विकासशील देशों में नगरीय प्रभाव क्षेत्रों में सत्ताग्रों (प्राइमेट सिटी) के वर्चस्व का समालोचनात्मक मूल्यांकन कीजिए। (15 अंक)
(c) "वैश्विक जनसांख्यिकीय परिदृश्य कुछ स्थानों पर तेजी से जनसंख्या वृद्धि और अन्य स्थानों पर तेजी से वृद्धावस्था के साथ विकसित हो रहा है।" उदाहरण के साथ स्पष्ट कीजिए। (15 अंक)
Answer approach & key points
Framework: Concept > Diagram > Regional Example > Application. (a) explain: definition/context > points in order > small example > short close | (b) critically evaluate: positives > negatives/limits > conditions/safeguards > conclusion | (c) explain: definition/context > points in order > small example > short close Full marks: Precise definitions, clear mechanisms, specific regional examples, and relevant diagrams.
Oil central to energy security: >90% transport share; hard-to-abate aviation/marine
Bridge-fuel limits: does not balance renewable variability (gas/hydro/storage do); stop-gap for hard-to-electrify uses; petrochemical feedstocks
IEA Net Zero: sharp demand decline needed; stranded-asset risk; transition role limited and time-bound
Primate city defined (Jefferson's law); examples Mexico City, Buenos Aires, Bangkok, Lagos
Mechanism: cumulative causation, agglomeration economies, political centralization, concentrated infrastructure
Specific example: Jakarta's financial/port/service dominance
Critique: dominance not absolute; India polycentric (state-level primacy only); Nusantara relocation; secondary cities (Pune, Hyderabad, Surabaya) and polycentric regions moderate it; verdict on structural dominance
50MexplainRegional development theories, population theories, regional synthesis
(a) Why has F. Perroux's theory of growth pole as a model of regional growth been criticised? Explain with examples. (20 marks)
(b) Analyze the role of demographic transition theory in explaining variations in fertility and mortality rates globally. (15 marks)
(c) How do regional components make the regional synthesis in spatial arrangement? Explain. (15 marks)
हिंदी में पढ़ें
(a) प्रादेशिक विकास के मॉडल के रूप में एफ० पेरॉक्स के विकास ध्रुव सिद्धांत की आलोचना क्यों हुई? उदाहरणों के साथ समझाइए। (20 अंक)
(b) विश्व में प्रजनन एवं मृत्यु दर की विषमता का वर्णन करने में जनसंख्या संक्रमण सिद्धांत की भूमिका का विस्लेषण कीजिए। (15 अंक)
(c) प्रादेशिक घटक कैसे भूस्थानिक व्यवस्था में प्रादेशिक संश्लेषण करते हैं? व्याख्या कीजिए। (15 अंक)
Answer approach & key points
Framework: Concept or mechanism > Diagram > Regional example > Application. (a) critique: the claim > its strengths > its weaknesses > your judgment | (b) analyse: intro > causes > effects > stakeholders/linkages > way forward | (c) explain: definition/context > points in order > small example > short close Full marks: Clear mechanism, specific examples, balanced judgment, and relevant diagrams.
Perroux's growth pole defined (abstract economic space, propulsive industries, inter-industry linkages); Boudeville's geographic translation
Criticism 1: polarization/backwash effects dominate spread (Myrdal; Hirschman's polarization vs trickling-down) → core-periphery inequality, enclave development
Criticism 2: capital-intensive, minimal local employment, weak forward-backward linkages; Criticism 3: neglect of institutional/social infrastructure