UPSC Mains 2022 Geography Optional Question Papers with Model Answers

All 55 questions of the 2022 Civil Services Main Examination, Geography Paper I and Geography Paper II, with marks and a suggested time per part. Solve each part on paper first, then open the model answer, or send it to answer-writing practice for evaluation.

UPSC Mains 2022 Geography Paper I

Question 1 (50 marks)

Q1(a) · Geomorphic Processes and Landscape Development · 10 marks≈ 7 min
Karst, Glacial, Aeolian and Coastal Landforms
Define 'speleothem'. Discuss the various forms and features of speleothems.
हिंदी में प्रश्न
'स्पेलियोथेम' को परिभाषित कीजिए। स्पेलियोथेम्स के विभिन्न रूपों एवं लक्षणों की चर्चा कीजिए।
Practise this question Geomorphic Processes and Landscape Development notes
Model answer
Paper and question: Paper I, Q1(a)
Approach: Define speleothem and the chemistry of its deposition, describe the main forms (stalactite, soda straw, stalagmite, column, flowstone, drapery, helictite, rimstone, cave pearl) and their significance with Indian caves; draw a cave section with the forms labelled.
A speleothem (Greek spelaion, cave, and thema, deposit) is a secondary mineral deposit formed in a cave, most often of calcite. Rainwater charged with carbon dioxide dissolves limestone; when this water seeps into an air-filled cave, carbon dioxide degasses and calcium carbonate is precipitated.
Dripping forms: stalactites hang from the roof, beginning as hollow soda straws; stalagmites grow up from the floor beneath the drip; where the two meet they form columns or pillars.
Flowing forms: flowstone sheets coat walls and floors; draperies or curtains form where water runs down an inclined roof; rimstone dams (gours) build terraced pools.
Other forms: helictites grow in twisting directions under capillary forces; cave pearls form around nuclei in agitated pools; moonmilk is a soft white deposit.
Diagram: Cave cross-section labelling stalactite, soda straw, stalagmite, column, flowstone, drapery and rimstone pool.
Examples and significance: Borra and Belum caves (Andhra Pradesh), Kotumsar (Chhattisgarh) and the Meghalaya caves such as Mawmluh. Growth layers record past rainfall; a Mawmluh stalagmite defines the boundary of the Meghalayan Age (about 4,200 years ago) ratified in 2018, making speleothems valuable palaeoclimate archives.
Q1(b) · Environmental Geography · 10 marks≈ 7 min
Environmental Hazards, Policy, Education and Legislation
What are the high altitude environmental hazards? Explain with suitable examples.
हिंदी में प्रश्न
उच्च ऊँचाई पर्यावरणीय खतरे क्या हैं? उचित उदाहरणों द्वारा वर्णन कीजिए।
Practise this question Environmental Geography notes
Model answer
Paper and question: Paper I, Q1(b)
Approach: Define high altitude hazards and classify them (physiological, snow and ice, mass movement, hydro-meteorological) with Himalayan examples, ending with management; mark the cited places on a map of the Himalaya.
High altitude environmental hazards arise above roughly 2,500 to 3,000 m, where thin air, intense cold, steep slopes and ice combine with growing human presence.
Physiological hazards: hypoxia causes acute mountain sickness and pulmonary and cerebral oedema; frostbite, hypothermia and intense ultraviolet radiation affect soldiers on Siachen, Amarnath pilgrims and trekkers.
Snow and ice hazards: avalanches, such as the one that buried an army post on the Siachen glacier in February 2016; blizzards and cold waves in Ladakh; and glacial lake outburst floods, as from South Lhonak in Sikkim (2023).
Mass movements: rockfalls, landslides and the rock-ice avalanche from Ronti peak that caused the Chamoli flood (February 2021), and land subsidence at Joshimath (2023).
Hydro-meteorological hazards: cloudbursts and flash floods, as at Leh (2010) and Kedarnath (2013).
Map: Outline map of the Indian Himalaya marking Siachen, Leh, Amarnath, Kedarnath, Chamoli (Ronti), Joshimath and South Lhonak lake.
Warming, road building and mass tourism are intensifying these hazards, so acclimatisation norms, hazard zoning and early warning systems are essential.
Q1(c) · Climatology: Weather Systems, Climates and Climate Change · 10 marks≈ 7 min
Global Climate Change, Applied and Urban Climatology
What is pollution dome? Discuss its formation and impacts.
हिंदी में प्रश्न
प्रदूषण गुम्बद क्या है? इसके निर्माण एवं प्रभावों की चर्चा कीजिए।
Practise this question Climatology: Weather Systems, Climates and Climate Change notes
Model answer
Paper and question: Paper I, Q1(c)
Approach: Define a pollution (dust) dome, explain its formation through the urban heat island circulation and inversions, then its impacts, with Indian and world examples and a section diagram.
A pollution dome (dust dome) is a dome-shaped mass of polluted air that sits over a city on calm days, trapped by the city's own air circulation and a temperature inversion.
Formation: the urban heat island makes the city centre warmer than its surroundings, so air rises over the centre, spreads outward aloft, sinks over the cooler outskirts and flows back inward near the ground. Pollutants from traffic, industry and burning are carried round this closed loop. An inversion acts as a lid, and light winds keep the dome in place; when winds strengthen, it is stretched downwind into a pollution plume.
Impacts: (i) smog and very poor air quality, raising respiratory and heart disease; (ii) reduced visibility and sunlight; (iii) more fog and haze, as particles act as condensation nuclei; (iv) higher night temperatures; (v) altered rainfall downwind.
Diagram: Section across a city showing rising air over the centre, outflow aloft, sinking at the edges, an inversion lid and the dome of pollutants.
Examples: Delhi's winter smog and London's Great Smog of 1952. Control needs emission cuts and green, ventilated urban design.
Q1(d) · Oceanography · 10 marks≈ 7 min
Marine Resources, Coral Reefs and Sea-level Change
When corals are affected by stress it causes them to turn completely white. Explain the reasons of such an occurrence.
हिंदी में प्रश्न
जब प्रवाल तनाव से प्रभावित होते हैं तो तनाव के कारण पूर्णरूप से श्वेत हो जाते हैं। इस घटना के कारणों की व्याख्या कीजिए।
Practise this question Oceanography notes
Model answer
Paper and question: Paper I, Q1(d)
Approach: Explain coral bleaching as the loss of symbiotic zooxanthellae under stress, then list the stress factors (temperature first) with examples; draw a diagram of a healthy and a bleached polyp.
The whitening of stressed corals is called coral bleaching. Reef-building corals live in symbiosis with microscopic algae, zooxanthellae, in their tissues, which provide most of their food through photosynthesis and give them colour. Under stress, the algae produce harmful compounds and are expelled, so the transparent tissue reveals the white limestone skeleton.
High temperature: the main cause; water about 1 °C above the usual summer maximum for several weeks triggers mass bleaching, as during El Niño years (1998, 2016) on the Great Barrier Reef and in the Gulf of Mannar and Lakshadweep.
Other stresses: intense sunlight and UV in calm, clear water; low salinity from heavy rain or floods; sediment and nutrient pollution; ocean acidification; disease; and very low tides exposing reefs.
Diagram: Two coral polyps: one coloured with zooxanthellae in its tissue, one white after their expulsion, with arrows showing heat stress.
If stress ends soon, corals can regain algae and recover; prolonged bleaching leads to starvation and death.
Q1(e) · Biogeography · 10 marks≈ 7 min
Soil Genesis, Profile, Classification and Distribution
Well developed soils typically exhibit distinct layers in their soil profile. Elaborate.
हिंदी में प्रश्न
पूर्णरूप से विकसित मृदा में आम तौर पर मृदा परिच्छेदिका के विभिन्न स्तर स्पष्ट प्रदर्शित होते हैं। विस्तृत वर्णन कीजिए।
Practise this question Biogeography notes
Model answer
Paper and question: Paper I, Q1(e)
Approach: Explain why mature soils develop distinct horizons through soil-forming factors and processes over time, contrast with immature soils, and draw mature versus young profiles.
A well-developed or mature soil is one in which soil-forming processes have acted long enough to divide the profile into distinct horizons that differ in colour, texture, structure and chemistry.
Hans Jenny (1941) showed that soil is a function of climate, organisms, relief, parent material and time. Given stable relief and enough time, climate and organisms transform the parent rock layer by layer.
Roy Simonson (1959) explained horizon formation by four processes: additions (litter, dust), losses (leaching of bases), translocations (clay, iron and humus moving from A and E into B) and transformations (weathering, humification). Their uneven action with depth creates the layers.
Diagram: Two profiles side by side: a mature podzol with O, A, E, Bs and C horizons, and a young alluvial soil showing only a thin A over stratified C.
Examples: podzols of the taiga show a bleached E over a rusty B; chernozems have a thick black A over a calcium carbonate layer; laterites show an iron-rich hardpan. In contrast, the khadar alluvium of the Ganga plain and the regosols of the Thar dunes are young and lack clear horizons.
Distinct layering is thus a sign of soil maturity and a guide to fertility.

Question 2 (50 marks)

Q2(a) · Environmental Geography · 20 marks≈ 14 min
Ecosystems, Ecological Imbalances and Environmental Degradation
Sequential changes in land use and land cover have brought global and regional ecological changes and imbalances. Elucidate.
हिंदी में प्रश्न
भूमिउपयोग एवं भूआवरण में अनुक्रमिक परिवर्तनों ने वैश्विक एवं प्रादेशिक पारिस्थितिकी में परिवर्तन एवं असंतुलन उत्पन्न किया है। स्पष्ट कीजिए।
Practise this question Environmental Geography notes
Model answer
Paper and question: Paper I, Q2(a)
Approach: Define land use and land cover change, show the typical sequence of transitions, and explain the resulting ecological changes at global and regional scales with Indian and world examples, ending with management. A diagram of the land-use transition sequence is central.
Land cover is the physical surface (forest, grassland, water, built-up), while land use is the human purpose it serves. Land use changes in a sequence as societies develop; Lambin and Geist showed that such change is driven by population, markets, technology and policy acting together.
Sequence of change: natural forest or grassland → shifting cultivation and grazing → settled rain-fed farming → irrigated, mechanised monoculture → urban and industrial use, with a later stage of reforestation in some rich countries (the forest transition, as in Europe).
Diagram: A horizontal sequence of five boxes, wilderness → frontier clearing → subsistence farming → intensive agriculture → urban land, with curves below showing falling biodiversity and natural cover and rising food output and pollution.
Global changes: clearing of forests and peatlands releases carbon and adds to climate change; replacement of forests by crops and cities changes albedo and evapotranspiration; habitat loss is the leading cause of biodiversity decline according to IPBES (2019).
Regional changes abroad: cattle ranching and soy farming in the Amazon reduce regional rainfall; oil palm in Indonesia and Malaysia caused peat fires and haze; ploughing of the Great Plains led to the Dust Bowl of the 1930s.
Indian examples: the Green Revolution turned Punjab and Haryana into rice–wheat monocultures, leading to falling water tables, soil nutrient loss and stubble-burning smog; urban sprawl over lakes and floodplains worsened floods in Chennai (2015) and Bengaluru (2022); coal mining in Jharia and Singrauli destroyed forests and aquifers.
Change is not always negative: forest and tree cover in India is 25.17% of geographical area (ISFR 2023) partly from plantations, which do not equal natural forests in ecological value.
Monitoring with remote sensing, land-use planning, wetland and floodplain zoning, and restoration under the Green India Mission can reduce imbalances. Land-use change is thus the main link between human development and ecological change at every scale.
Q2(b) · Geomorphic Processes and Landscape Development · 15 marks≈ 11 min
Channel Morphology and Fluvial Landforms
Explain how various aspects of channel morphology are used in transportation, settlement and land use planning, flood control and flood management?
हिंदी में प्रश्न
सरिता आकारिकी के विविध पहलुओं का ज्ञान किस प्रकार परिवहन, वस्ती एवं भूउपयोग नियोजनों तथा बाढ़ नियंत्रण एवं बाढ़ प्रबन्धन में उपयोग किया जाता है वर्णन कीजिए।
Practise this question Geomorphic Processes and Landscape Development notes
Model answer
Paper and question: Paper I, Q2(b)
Approach: Identify the aspects of channel morphology (pattern, geometry, gradient, migration, bars and floodplain units), then take transportation, settlement and land-use planning, and flood control and management in turn with Indian and world examples; draw channel patterns and a floodplain zoning sketch.
Channel morphology covers channel pattern (straight, meandering, braided, anastomosing — L.B. Leopold and M.G. Wolman, 1957), cross-sectional geometry and its adjustment with discharge (hydraulic geometry, Leopold and Maddock, 1953), gradient, sinuosity, bars, migration rates and floodplain units such as levees, point bars and backswamps.
Transportation: navigation needs adequate depth and stable thalweg; braided, shifting channels like the Brahmaputra (National Waterway 2) and the Ganga (National Waterway 1) require dredging and channel marking. Bridges and roads are best sited where channels are narrow and stable, and bank protection guards approaches against migrating bends.
Settlement and land use: mapping of active meander belts and avulsion zones keeps towns and infrastructure away from hazardous ground, as on the Kosi fan; seasonally exposed char and diara lands are used for farming but not permanent buildings; the erosion of Majuli island shows the cost of ignoring bank migration.
Flood control and management: bankfull capacity and floodplain topography define flood zones; the Central Water Commission’s Model Bill for Flood Plain Zoning (1975) relies on such mapping. Embankments, spurs and revetments are placed at eroding cut banks; avulsion-prone reaches need monitoring, as the Kosi breach at Kusaha (2008) showed. Approaches such as the Dutch ‘Room for the River’ widen floodplains instead of raising levees.
Diagram: Plan sketches of straight, meandering and braided channels, and a floodplain cross-section with prohibited, restricted and safe zones.
Reading channel form thus allows planners to work with river dynamics rather than against them.
Q2(c) · Oceanography · 15 marks≈ 11 min
Waves, Currents and Tides
What is the relationship between ocean currents and global surface wind systems? Explain with examples how does the gyre in the Northern Hemisphere differ from the one in the Southern Hemisphere.
हिंदी में प्रश्न
महासागरीय धाराओं एवं वैश्विक धरातलीय पवन तंत्रों में क्या अन्तःसम्बन्ध है? उदाहरणों द्वारा वर्णन कीजिए कि किस प्रकार उत्तरी गोलार्ध के जलधारा घूर्णन दक्षिणी गोलार्ध के जलधारा घूर्णन से पृथक है।
Practise this question Oceanography notes
Model answer
Paper and question: Paper I, Q2(c)
Approach: Explain how the global wind belts drive surface currents (with Ekman transport and Coriolis), then compare the Northern and Southern Hemisphere gyres on direction, boundaries, strength and subpolar circulation with named examples; draw a world map of winds and gyres.
Surface currents are largely wind-driven: the pattern of ocean circulation mirrors the pattern of planetary winds, modified by the Coriolis force and the shape of the basins.
Relationship: the trade winds drive the North and South Equatorial Currents westward; the westerlies drive the North Atlantic, North Pacific and West Wind drifts eastward. Because of Ekman transport, water moves at an angle to the wind and piles up in the subtropics, so currents circle the subtropical highs as gyres. In the north Indian Ocean the monsoon reverses the currents seasonally, the clearest proof of wind control.
Direction: Northern Hemisphere gyres turn clockwise (Gulf Stream, Kuroshio, Canary, California), while Southern Hemisphere gyres turn anticlockwise (Brazil, Benguela, East Australian, Humboldt).
Boundaries: northern gyres are closed by continents on the poleward side, so their drifts turn back; southern gyres share an open poleward limb, the Antarctic Circumpolar Current, which links all three oceans.
Strength: northern western boundary currents (Gulf Stream, Kuroshio) are stronger and warmer than the Brazil and East Australian currents.
Subpolar circulation: the north has distinct anticlockwise subpolar gyres (Alaska, Labrador–Irminger), while the south has mainly the Weddell and Ross gyres near Antarctica.
Map: World map of the pressure belts and winds with the five subtropical gyres, clockwise in the north and anticlockwise in the south, and the West Wind Drift.
Thus winds set the pattern, but land and rotation make the two hemispheres' gyres different.

Question 3 (50 marks)

Q3(a) · Biogeography · 20 marks≈ 14 min
World Distribution of Plants and Animals; Gene Pool Centres
Plants and animals that exist in a particular ecosystem are those that have been successful in adjusting to their habitat and environmental conditions. Elucidate with examples.
हिंदी में प्रश्न
पादप एवं जन्तु जो एक विशिष्ट पारिस्थितिक तन्त्र में रहते हैं वे अपने को उस प्राकृतिक-वास एवं पर्यावरणीय दशाओं से समाकूलन करने में सफल हो चुके हैं। उचित उदाहरणों द्वारा स्पष्ट कीजिए।
Practise this question Biogeography notes
Model answer
Paper and question: Paper I, Q3(a)
Approach: Explain adaptation through the laws of tolerance and limiting factors, then elucidate with plant and animal examples from contrasting ecosystems (desert, mangrove, rainforest, tundra, high mountain) and the fate of those that fail; draw a tolerance curve.
Every ecosystem works as a filter. Liebig’s law of the minimum and Shelford’s law of tolerance (1913) state that a species survives only where each environmental factor lies within its range of tolerance; natural selection, as Darwin explained, keeps those that adapt and removes those that do not.
Hot deserts: cacti and euphorbias store water and open stomata at night; khejri in the Thar roots very deep; the camel tolerates water loss and the desert gerbil stays in burrows by day.
Mangroves: in the Sundarbans, Rhizophora and Avicennia grow breathing roots (pneumatophores), stilt roots and seeds that germinate on the tree (vivipary) to cope with salt and tides; mudskippers breathe air and the tiger swims between islands.
Tropical rainforests: buttress roots, drip-tip leaves, climbers and epiphytes reach for light; the lion-tailed macaque and great hornbill of the Western Ghats live in the canopy.
Diagram: Shelford’s tolerance curve: a bell-shaped curve of population against an environmental factor, with the optimum range at the centre, zones of stress on both sides and zones of intolerance at the ends.
Tundra and high mountains: cushion plants and mosses hug the ground; the musk ox and arctic fox carry dense fur; the yak has large lungs and the snow leopard a thick tail for warmth in Ladakh.
Species that fail to adjust disappear: the cheetah was declared extinct in India in 1952 after habitat loss and hunting, and its reintroduction at Kuno (2022) tests whether it can adjust again. Invasive Lantana and Prosopis show that wide tolerance also explains success.
Hence the composition of an ecosystem reflects long adjustment between life and habitat, which rapid human change now threatens to break.
Q3(b) · Climatology: Atmosphere and Circulation · 15 marks≈ 11 min
Atmospheric Stability, Air Masses and Frontogenesis
With suitable examples describe the impacts of movement of airmasses on weather and winds in different parts of the continents.
हिंदी में प्रश्न
उचित उदाहरणों द्वारा वायुराशियों के गतिमान होने पर महाद्वीपों के विभिन्न भागों में मौसम एवं पवनों पर पड़ने वाले प्रभावों का वर्णन कीजिए।
Practise this question Climatology: Atmosphere and Circulation notes
Model answer
Paper and question: Paper I, Q3(b)
Approach: Show how air masses change weather as they move (thermal and moisture modification, k and w types, fronts), then describe continent by continent the winds and weather they bring, with named events. Draw a world map of air mass movements.
Air masses carry the temperature and moisture of their source regions into other areas. As they move they are modified, and the contrast between them and the surfaces or air masses they meet controls weather and winds.
North America: outbreaks of Arctic and cP air move south along the Great Plains, bringing cold waves and blizzards, as during the February 2021 Texas freeze. Warm, humid mT air from the Gulf of Mexico moves north in spring, and its clash with cP air produces squall lines and tornadoes in 'Tornado Alley'. Westerly mP air from the Pacific gives rain and snow to the coast of British Columbia and Washington.
Europe: mP air carried by the westerlies brings mild, wet, changeable weather to Britain and Norway. When the Siberian High extends west, cP air brings severe cold, as in the 'Beast from the East' episode of 2018.
Map: World outline with arrows showing cP air moving south in North America and west into Europe, mT air moving north from the Gulf of Mexico, cT air from the Sahara to West Africa, and cP air from Siberia to East Asia.
Africa and Asia: dry cT air moving south from the Sahara is the Harmattan of West Africa; cP air from Siberia drives the cold, dry north-east winter monsoon over China. In India, cT air from the Thar gives the loo, while the moist south-west monsoon air brings rain; mixing of moist Bay air with dry air produces Norwesters.
Thus the movement of air masses explains seasonal winds, cold and heat waves, and storm belts across continents.
Q3(c) · Geomorphic Processes and Landscape Development · 15 marks≈ 11 min
Denudation Chronology, Erosion Surfaces and Slope Development
Discuss the role of Slope, Altitude and Relief (SAR) in landscape development.
हिंदी में प्रश्न
भूदृश्य विकास में ढ़ाल, ऊँचाई एवं उच्चावच्च की भूमिका की चर्चा कीजिए।
Practise this question Geomorphic Processes and Landscape Development notes
Model answer
Paper and question: Paper I, Q3(c)
Approach: Define slope, altitude and relief and how each is measured, explain their joint control on energy, process and landform development with examples, and show their use in morphometric analysis and planning; include a relative relief map or hypsometric curve.
Slope, altitude and relief (SAR) are the three basic morphometric attributes of a landscape. They express the potential energy available to geomorphic agents and are themselves the product of tectonics and denudation.
Altitude, the height above mean sea level, controls temperature, precipitation and vegetation, and thus the vertical zoning of processes: glacial above the snowline, periglacial below it, fluvial lower down, as from the Great Himalaya to the Shiwaliks. High altitude also means a large height above base level and hence great erosive potential.
Relative relief, the difference between the highest and lowest points in a unit area (G.H. Smith, 1935), indicates dissection and stage: high in young, rejuvenated terrain such as the Himalaya and the Western Ghats escarpment, low on the Ganga plain and old plateau surfaces.
Slope, the angle of the ground (average slope by C.K. Wentworth’s method, 1930), governs runoff, infiltration, soil depth and mass movement. Steep slopes favour landslides and debris flows, as in Uttarakhand; gentle slopes favour deposition and soil formation.
Together SAR determine drainage density, valley form and sediment yield, and their altimetric analysis (hypsometric and altimetric frequency curves) helps identify erosion surfaces.
Diagram: Relative relief map of a small basin with class shading, beside a hypsometric curve contrasting a youthful and a mature basin.
Applications: landslide hazard zonation, land capability classification and watershed planning all rely on SAR layers in GIS. SAR therefore links process energy to landform evolution and to practical land management.

Question 4 (50 marks)

Q4(a) · Climatology: Weather Systems, Climates and Climate Change · 20 marks≈ 14 min
Global Climate Change, Applied and Urban Climatology
Rise of surface temperature brings severe consequences. Elaborate the potential changes and threats associated with it in the world.
हिंदी में प्रश्न
सागर सतह के तापमान में वृद्धि का गंभीर परिणाम होता है। इससे सम्बन्धित विश्व में संभाव्य परिवर्तनों एवं खतरों का विस्तृत वर्णन कीजिए।
Practise this question Climatology: Weather Systems, Climates and Climate Change notes
Model answer
Paper and question: Paper I, Q4(a)
Approach: Elaborate the potential changes and threats from rising surface temperature: state the observed rise (IPCC AR6), then cover cryosphere and sea level, extremes, oceans, ecosystems, food and water, health and society, with world and Indian examples; conclude on mitigation and adaptation; add a world map of hotspots.
The IPCC Sixth Assessment Report (2021) found global surface temperature in 2011–2020 about 1.1°C above 1850–1900, and the WMO reported 2024 as the warmest year on record. Even small rises in the mean bring large changes in extremes.
Cryosphere and sea level: glaciers are retreating worldwide, including the Himalayan glaciers that feed the Ganga and Indus; Arctic summer sea ice is shrinking; and the Greenland and Antarctic ice sheets are losing mass. Global mean sea level rose about 0.20 m between 1901 and 2018 (AR6) and is accelerating, threatening deltas (Ganga–Brahmaputra, Nile, Mekong), cities such as Mumbai and Kolkata, and small island states such as the Maldives and Tuvalu.
Extremes: hotter and longer heat waves (Europe 2003, India 2024), heavier downpours and floods (Kerala 2018), more intense tropical cyclones and longer droughts and wildfire seasons (Australia 2019–20).
Oceans: warming and acidification cause mass coral bleaching, as on the Great Barrier Reef, and marine heat waves that move fish stocks poleward.
Ecosystems and food: species shift upslope and poleward, mountain and polar species lose habitat, and crop yields of wheat and rice fall in tropical regions under heat stress, while water supply grows less reliable as glaciers shrink and monsoon rains become erratic.
Society: heat stress cuts labour productivity, vector-borne diseases spread, and displacement from coasts and drylands raises migration and conflict risks; the poor and developing countries are hit hardest.
Map: World map marking the Arctic, Himalaya, low-lying deltas, small island states, coral reef belts and drought-prone Sahel and Mediterranean as hotspots.
Threats grow with each increment of warming and some, such as ice-sheet loss, may become irreversible beyond tipping points. Limiting warming through net-zero emissions and building adaptation, such as heat action plans and coastal defences, are both essential.
Q4(b) · Climatology: Atmosphere and Circulation · 15 marks≈ 11 min
Heat Budget, Temperature and Pressure Belts
Describe how short term variations in temperature are related to the processes of receiving energy from the sun to the Earth's surface and dissipating it to the atmosphere.
हिंदी में प्रश्न
तापमान में अल्पकालिक परिवर्तनों का सम्बन्ध किस प्रकार पृथ्वी के धरातल एवं वायुमण्डल के सौर्यिक ऊर्जा प्राप्ति एवं व्यय तंत्र से सम्बन्धित है। वर्णन कीजिए।
Practise this question Climatology: Atmosphere and Circulation notes
Model answer
Paper and question: Paper I, Q4(b)
Approach: Short-term variation means the daily (diurnal) and day-to-day changes of temperature; explain them through the balance between incoming insolation and outgoing terrestrial radiation, with the time lag of maximum and minimum, and the factors that modify it. Draw the diurnal curve of insolation, outgoing radiation and temperature.
Air is heated mainly from below. The sun heats the ground by short-wave insolation, and the ground passes heat to the air by long-wave radiation, conduction, convection and latent heat. Short-term temperature variation, chiefly the diurnal cycle, follows the changing balance between energy received and energy lost.
Rise during the day: after sunrise, insolation exceeds outgoing radiation and the surface warms. Insolation peaks at noon, but the surface keeps gaining more than it loses for some hours, so maximum air temperature comes at about 2–3 p.m. This is the lag of temperature.
Fall at night: after sunset there is no insolation, the ground keeps radiating and cools, and the air in contact cools by conduction. Temperature is lowest just before sunrise.
Diagram: Graph of a 24-hour day showing the insolation curve peaking at noon, a flatter outgoing radiation curve, and the air temperature curve peaking at about 2–3 p.m. and lowest near sunrise, with surplus and deficit shaded.
Factors modifying the range: clear, dry air allows strong heating and rapid night cooling, so the Thar and the Sahara have large daily ranges. Clouds and humidity absorb outgoing radiation, so coastal Mumbai or Kochi in the monsoon has a small range. Water heats and cools slowly because of its high specific heat, so oceans and coasts vary little.
Day-to-day variation: advection of air masses, cloud cover and rain also change temperature, as when a western disturbance brings cold days to north India.
Short-term temperature change thus mirrors the surface energy balance.
Q4(c) · The Earth's Interior and Tectonics · 15 marks≈ 11 min
Plate Tectonics and Mountain Building
With the help of suitable sketches describe the mountain genesis and mountain types. Give suitable examples from various mountain systems of the world.
हिंदी में प्रश्न
उचित आरेखों की सहायता से पर्वत निर्माण एवं पर्वत के प्रकारों का वर्णन कीजिए। विश्व के विविध पर्वत तंत्रों से उदाहरण प्रस्तुत कीजिए।
Practise this question The Earth's Interior and Tectonics notes
Model answer
Paper and question: Paper I, Q4(c)
Approach: Describe mountain genesis (geosynclinal and plate-tectonic views of orogeny, faulting, volcanism, denudation) and then the types of mountains with examples from world systems; support with labelled sketches of fold, block and volcanic mountains.
A mountain is a landform rising steeply well above its surroundings with a small summit area. Mountains arise from endogenetic forces, compression, tension and volcanism, and are later shaped by denudation.
Genesis: classical theories (Kober, Holmes) traced fold mountains to compression of geosynclinal sediments. Plate tectonics now explains most mountains at plate margins: subduction raises the Andes and island arcs such as Japan, and collision raised the Himalaya and Alps. Tension at divergent zones forms rift blocks (East African highlands), and hotspots build volcanoes inside plates (Hawaii).
Types: (1) Fold mountains: young Alpine–Himalayan and Circum-Pacific chains (Himalaya, Alps, Rockies, Andes) and old Caledonian and Hercynian chains (Appalachians, Urals, Aravallis).
(2) Block mountains: horsts between faults, such as the Vosges and Black Forest flanking the Rhine rift valley, the Sierra Nevada and the Satpura.
(3) Volcanic mountains: Kilimanjaro, Fuji, Cotopaxi and Mauna Loa. (4) Dome mountains: the Black Hills of South Dakota. (5) Residual mountains: remnants of denudation such as the Aravallis, Eastern Ghats and Scottish Highlands.
Diagram: Three labelled sketches: an anticline–syncline fold belt, a horst between two normal faults beside a graben, and a stratovolcano with crater and vent.
Most great systems combine origins: the Andes have both fold ranges and volcanoes, and old fold belts survive as residual hills, so genesis and age must be read together.

Question 5 (50 marks)

Q5(a) · Perspectives in Human Geography · 10 marks≈ 7 min
Languages, Religions, Cultural Regions and the Human Development Index
Analyse the effects of Globalisation on languages.
हिंदी में प्रश्न
भाषाओं पर वैश्वीकरण के प्रभावों का विश्लेषण कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q5(a)
Approach: Explain how globalisation spreads some languages and endangers others, give positive and negative effects with world and Indian examples, and conclude with measures.
Globalisation, the intensifying flow of goods, capital, people and information, has reshaped the world's linguistic map through trade, migration, media and the internet.
Positive effects: English has become a global lingua franca of business, science and the internet, aiding mobility, as India's IT and BPO sectors show; Mandarin, Spanish and Arabic are expanding; digital tools (Unicode, machine translation) now let smaller languages appear online; diasporas spread Hindi, Tamil and Punjabi abroad.
Negative effects: about 40 per cent of the world's roughly 7,000 languages are endangered, and UNESCO's Atlas (2010) listed 197 Indian languages as endangered, the highest for any country. Dominant languages displace minority ones as young people shift for jobs; vocabulary hybridises (Hinglish); and knowledge embedded in tribal languages of the North-east and Andaman islands is lost, as with Great Andamanese languages.
Diagram: Pyramid with a few global languages at the top, national and regional languages in the middle, and thousands of endangered local languages at the base.
Remedies include mother-tongue education under NEP 2020, documentation schemes and UNESCO's International Decade of Indigenous Languages (2022-2032).
Q5(b) · Economic Geography · 10 marks≈ 7 min
World Industries and Patterns of World Trade
"Shifting global trade patterns create new opportunities". Examine this statement.
हिंदी में प्रश्न
"वैश्विक व्यापार प्रतिरूपों का परिवर्तन नवीन अवसर उत्पन्न करता है"। इस कथन का परीक्षण कीजिए।
Practise this question Economic Geography notes
Model answer
Paper and question: Paper I, Q5(b)
Approach: Identify the main shifts in global trade (rise of Asia, China plus one, regionalism, services and digital trade, green goods), then examine the opportunities they create, especially for India, and add a caution.
Global trade patterns are shifting: Asia's share has risen, supply chains are diversifying away from China after the pandemic and US-China tensions, regional agreements are multiplying, and services and digital trade are growing faster than goods.
Opportunities: (i) the China plus one strategy lets Vietnam, Mexico, India and Bangladesh attract electronics, textile and auto investment; Apple's suppliers now assemble iPhones in Tamil Nadu and Karnataka, aided by India's PLI scheme (2020); (ii) new agreements such as India's CEPA with the UAE (2022), ECTA with Australia (2022) and TEPA with EFTA (2024) open markets; (iii) services trade favours India's IT and global capability centres; (iv) green goods such as solar modules, batteries and green hydrogen create new export niches; (v) new corridors such as the India-Middle East-Europe Economic Corridor (2023) and the International North-South Transport Corridor.
Map: World map showing shifting flows: arrows from China to South-east Asia, India and Mexico, and the IMEC and INSTC corridors.
Caution: protectionism, carbon border taxes such as the EU's CBAM and weak logistics can limit gains, so competitiveness and infrastructure are essential.
Q5(c) · Settlement Geography · 10 marks≈ 7 min
Urban Morphology and Functional Classification of Towns
Examine the morphological factors that influence the origin and growth of towns.
हिंदी में प्रश्न
नगरों की उत्पत्ति एवं विकास को प्रभावित करने वाले आकारिकी कारकों का परीक्षण कीजिए।
Practise this question Settlement Geography notes
Model answer
Paper and question: Paper I, Q5(c)
Approach: Identify morphological (site and situation) factors that explain where towns originate and how their form grows, with Indian examples, and conclude.
Urban morphology is the study of the physical form of towns: site, street plan, land use and buildings. The origin and growth of towns depend on morphological factors of site (the land itself) and situation (relation to surroundings).
Site factors: river banks and confluences for water and trade (Prayagraj, Varanasi, Patna); defensive hills and islands (Gwalior fort, Mumbai's islands); sheltered harbours (Visakhapatnam, Kochi); bridging and fording points; cool hill slopes for hill stations (Shimla, Darjeeling); mineral sites for mining towns (Dhanbad).
Situation factors: route junctions and gaps (Delhi between the Aravalli ridge and the Yamuna), coastal-inland break-of-bulk points, and centrality in fertile plains, which made market towns.
Diagram: Sketches of town forms shaped by morphology: linear along a river (Varanasi), radial from a fort (Jaipur's grid within walls), and fan-shaped around a harbour (Mumbai).
Growth then follows relief and routes: towns extend along transport axes, avoid floodplains and steep slopes, and coalesce into conurbations, as along the Hooghly. Morphology thus sets both location and shape.
Q5(d) · Regional Planning · 10 marks≈ 7 min
Regional Imbalances and Development Strategies
Discuss the role of transportation accessibility in regional development.
हिंदी में प्रश्न
प्रादेशिक विकास में परिवहन सुगम्यता की भूमिका की चर्चा कीजिए।
Practise this question Regional Planning notes
Model answer
Paper and question: Paper I, Q5(d)
Approach: Define accessibility and explain how transport drives regional development (market access, diffusion, integration), with models (Taaffe-Morrill-Gould) and Indian examples, and note limits.
Accessibility is the ease with which a place can be reached from other places, measured by distance, time, cost or network connectivity (Kansky's indices). Transport accessibility shapes which regions grow.
Roles: (i) it widens market access for farm produce and industry, lowering costs; (ii) it attracts investment and enables agglomeration along corridors; (iii) it diffuses innovations, services and information; (iv) it integrates lagging regions into the national economy. Taaffe, Morrill and Gould's model (1963) for Ghana and Nigeria showed how transport networks evolve from scattered ports to interconnected systems, with development following routes.
Indian examples: the Golden Quadrilateral and industrial corridors (Delhi-Mumbai); the Pradhan Mantri Gram Sadak Yojana (2000), which linked rural habitations and raised farm incomes and school enrolment; the Konkan Railway; and the Bogibeel bridge and new rail links integrating the North-east.
Diagram: Taaffe-Morrill-Gould sequence: scattered ports → penetration lines → feeders and interconnection → high-priority main streets.
Limits: roads alone cannot create growth without complementary investments, and better access can also drain resources from weak regions to strong ones.
Q5(e) · Models, Theories and Laws in Human Geography · 10 marks≈ 7 min
Heartland and Rimland Theories; Boundaries and Frontiers
Explain the geometrical boundaries with examples.
हिंदी में प्रश्न
उदाहरणों सहित ज्यामितीय सीमाओं का वर्णन कीजिए।
Practise this question Models, Theories and Laws in Human Geography notes
Model answer
Paper and question: Paper I, Q5(e)
Approach: Define geometrical boundaries, explain why they are drawn, give world and Asian examples, and note their merits and problems.
Geometrical boundaries are straight-line boundaries drawn along lines of latitude or longitude, or as straight lines between fixed points, without regard to physical or cultural features. They are a type of artificial boundary, usually drawn in sparsely populated or poorly surveyed areas.
Examples: the 49th parallel between the USA and Canada west of the Lake of the Woods; the 141st meridian between Alaska and Canada's Yukon; the 22nd parallel between Egypt and Sudan; the straight-line borders of Libya, Algeria, Mali and Mauritania, drawn by colonial powers at and after the Berlin Conference (1884-85); the 38th parallel, near which the Korean demilitarised zone now runs; and the Utah-Colorado-Arizona-New Mexico 'Four Corners' within the USA.
Map: World sketch marking the 49th parallel, the 141st meridian, the Egypt-Sudan 22°N line and the straight boundaries of the Sahara.
Merits: simple to define and demarcate. Problems: they ignore ethnic, tribal and physical realities, dividing communities and pastures and creating disputes, as in the Halaib triangle between Egypt and Sudan.

Question 6 (50 marks)

Q6(a) · Perspectives in Human Geography · 20 marks≈ 14 min
Languages, Religions, Cultural Regions and the Human Development Index
"Culture is a dynamic concept". Elucidate with examples.
हिंदी में प्रश्न
"संस्कृति एक गतिशील संकल्पना है"। उदाहरणों द्वारा विस्तृत व्याख्या कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q6(a)
Approach: Define culture (Tylor) and explain why it is dynamic, then elucidate the processes of cultural change (innovation, diffusion, acculturation, globalisation, environment and technology) with Indian and world examples, and conclude.
E.B. Tylor (1871) defined culture as the complex whole of knowledge, belief, art, morals, law, custom and other capabilities acquired by people as members of society. Because it is learned, shared and transmitted, culture constantly changes; Carl Sauer's Berkeley school showed how cultures reshape landscapes over time.
Innovation: new ideas and technologies change ways of life. The Green Revolution transformed Punjab's cropping, diet and social structure; mobile phones and UPI have changed how rural India buys and sells.
Diffusion: traits spread from hearths. Hagerstrand distinguished expansion diffusion (contagious and hierarchical) from relocation diffusion. Buddhism spread from the Ganga plain to Sri Lanka, Tibet and Japan; Islam reached Indonesia by trade; cricket spread through the British empire and is now dominated by South Asia.
Acculturation and syncretism: contact produces blended forms such as Indo-Islamic architecture, the Bhakti and Sufi traditions, Urdu, and Goan culture mixing Portuguese and Konkani traits.
Globalisation and migration: fast food, Western dress and K-pop spread worldwide, while yoga, Indian cuisine and Bollywood go global; diasporas create hybrid cultures in London's Southall or Toronto.
Diagram: Hagerstrand-style sketch of expansion diffusion (contagious ripples and hierarchical jumps between cities) and relocation diffusion (migration arrows to a new region).
Environment, politics and technology also matter: climate change is altering pastoral nomadism in Ladakh and the Sahel; states promote or suppress languages and religions. Yet change is selective: core values, festivals and food habits often persist, and revivals of folk arts and regional identity show resistance. Culture is thus dynamic but rooted, a continuous negotiation between tradition and change.
Q6(b) · Economic Geography · 15 marks≈ 11 min
World Industries and Patterns of World Trade
"Automation is rapidly changing the economies of labour and will affect trade patterns in significant ways". Clarify.
हिंदी में प्रश्न
"स्वचालन तीव्रगति से श्रमिक अर्थव्यवस्थाओं को परिवर्तित कर रहा है तथा व्यापार प्रतिरूप को व्यापक पैमाने पर प्रभावित करेगा"। स्पष्ट कीजिए।
Practise this question Economic Geography notes
Model answer
Paper and question: Paper I, Q6(b)
Approach: Define automation, explain how it changes the economics of labour (substitution, skill polarisation, cost advantage of cheap labour) and how this alters trade patterns (reshoring, shorter chains, services and data trade), with examples and implications for India.
Automation is the use of robots, artificial intelligence and digital systems to perform tasks once done by human labour. It is part of the Fourth Industrial Revolution and is spreading rapidly in manufacturing, logistics and services.
Changing economics of labour: (i) substitution of routine manual and clerical jobs; Frey and Osborne (2013) estimated that about 47 per cent of US jobs were at high risk; (ii) skill polarisation, with demand rising for high-skill and some low-skill service jobs while middle-skill jobs shrink; (iii) the cost advantage of cheap labour declines, since a robot costs the same in Germany as in Bangladesh; (iv) productivity gains concentrate income among capital owners, widening inequality.
Effects on trade: (i) reshoring and nearshoring of some production closer to consumers, as automated factories reduce the need to locate in low-wage countries; (ii) shorter, regional value chains; (iii) a relative decline in trade in labour-intensive goods and growth in trade of robots, chips, software and data; (iv) services trade, including remote IT and AI services, rises; (v) countries with skilled workforces and digital infrastructure gain.
Diagram: Flow chart: automation → lower labour share of costs → location decided by markets, skills and energy rather than wages → reshoring and shorter chains → new trade patterns.
For India, automation threatens the classic export-led path through garments and assembly, but offers opportunities in IT services, global capability centres and robotics. Skilling (Skill India), labour-intensive niches and social protection are therefore vital.
Q6(c) · Settlement Geography · 15 marks≈ 11 min
Urbanisation: Problems, Remedies and Sustainable Cities
"Over crowding leads to chronic problem of shortage of housing in Indian cities". Explain citing relevant examples.
हिंदी में प्रश्न
"अति भीड़ भारतीय नगरों में दीर्घकालिक आवासीय अभाव की समस्या को उत्पन्न करती है"। उपयुक्त उदाहरणों सहित स्पष्ट कीजिए।
Practise this question Settlement Geography notes
Model answer
Paper and question: Paper I, Q6(c)
Approach: Explain how overcrowding (population growth, migration, high density) creates housing shortage, give data (Kundu committee, Census) and city examples, describe consequences, and outline policy responses.
Overcrowding in Indian cities results from rapid natural growth and rural-urban migration into a limited stock of serviced land and dwellings. Demand outpaces supply, especially at the low-income end, producing chronic housing shortage.
Scale: the Technical Group on Urban Housing Shortage (chaired by Amitabh Kundu) estimated a shortage of about 18.8 million units in 2012, over 95 per cent in the economically weaker and lower-income groups. Census 2011 counted about 6.5 crore people in slums, and many households live in one room. Paradoxically, Census 2011 also recorded over a crore vacant urban houses, built for investment and unaffordable for the poor.
Examples: Mumbai, where over 40 per cent of people live in slums such as Dharavi and densities are among the world's highest; Delhi's unauthorised colonies and resettlement colonies; Kolkata's bustees; Chennai's slums along the Cooum and Adyar rivers.
Diagram: Flow chart: population growth and migration → high density and land scarcity → rising land prices → unaffordable formal housing → slums, overcrowded rooms and pavement dwelling.
Responses: PMAY-Urban (2015), which sanctioned over one crore houses, and PMAY-U 2.0 (2024); Affordable Rental Housing Complexes for migrants (2020); in-situ slum redevelopment; and reform of rent control and floor-area rules. Increasing land supply through transit-oriented development and rental housing is essential.

Question 7 (50 marks)

Q7(a) · Economic Geography · 20 marks≈ 14 min
Food Security, Nutrition and Famine
"Climate change is a serious problem to global food security and poverty eradication". Critically examine.
हिंदी में प्रश्न
"जलवायु परिवर्तन विश्व खाद्य सुरक्षा एवं गरीबी उन्मूलन में एक गंभीर समस्या है"। आलोचनात्मक परीक्षण कीजिए।
Practise this question Economic Geography notes
Model answer
Paper and question: Paper I, Q7(a)
Approach: Define food security (four pillars) and explain how climate change affects each pillar and deepens poverty, with world and Indian evidence, then critically examine the counter-arguments (adaptation, CO2 fertilisation, non-climate causes) and conclude with solutions.
The World Food Summit (1996) defined food security as existing when all people, at all times, have physical and economic access to sufficient, safe and nutritious food for an active and healthy life. Its four pillars are availability, access, utilisation and stability. The IPCC's Sixth Assessment Report (2022) concluded that climate change has already reduced food security, especially in Africa, Asia and small islands.
Availability: rising temperatures shorten crop duration and cut yields of wheat, maize and rice; the March 2022 heatwave reduced India's wheat output and led to export curbs. Erratic monsoons, floods (Pakistan, 2022) and droughts (Horn of Africa, 2020-23) destroy harvests; warming seas hurt fisheries and coral-dependent communities.
Access and stability: crop failures raise prices and reduce farm incomes; extreme events destroy assets and push vulnerable households into poverty and distress migration, as in Bundelkhand and the Sahel. Global price spikes hurt import-dependent countries.
Utilisation: higher carbon dioxide lowers the protein, zinc and iron content of cereals; heat and floods spread water-borne diseases that impair nutrient absorption.
Map: World map showing climate hotspots for food insecurity: the Sahel, Horn of Africa, South Asia's Indo-Gangetic plain and coastal deltas, Central America's Dry Corridor and Pacific islands.
Critical view: some temperate regions such as Canada and Russia may gain longer growing seasons; carbon dioxide fertilisation can raise some yields; and conflict, poverty and poor governance remain the main causes of hunger today. Climate change is therefore a 'threat multiplier' rather than the sole cause, hitting hardest those who are already poor.
Responses: climate-resilient varieties (ICAR has released heat- and drought-tolerant wheat and rice), crop diversification to millets, micro-irrigation, crop insurance (PMFBY, 2016), early warning systems, social safety nets such as NFSA and MGNREGA, and international adaptation finance.
Thus the statement is largely valid: without adaptation and emission cuts, climate change will undermine both food security and poverty eradication (SDG 1 and 2).
Q7(b) · Perspectives in Human Geography · 15 marks≈ 11 min
Quantitative Revolution and Locational Analysis
Critically examine the significance of the Quantitative Revolution and its influence in the development of Geography.
हिंदी में प्रश्न
मात्रात्मक क्रान्ति की सार्थकता एवं भूगोल के विकास में मात्रात्मक क्रान्ति के प्रभाव का आलोचनात्मक परीक्षण कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q7(b)
Approach: Define the quantitative revolution, examine its significance (scientific method, models, laws, tools) and influence on branches of geography, then critically assess its weaknesses and the reactions it provoked.
The quantitative revolution (late 1950s-1960s) transformed geography from a descriptive, idiographic subject into a spatial science using statistics, mathematics and models. Burton (1963) declared that the revolution was over, its methods having become mainstream.
Significance: (i) it adopted the hypothetico-deductive method of logical positivism; (ii) it sought generalisations and laws (Schaefer, 1953); (iii) it gave precise techniques: correlation, regression, factor analysis, nearest-neighbour analysis, network indices (Kansky); (iv) it revived location theories of Von Thunen, Weber, Christaller and Losch; (v) it laid the base for remote sensing, computer cartography and GIS.
Influence on branches: urban geography (rank-size rule, central place studies, factorial ecology), economic geography (industrial location, gravity models of trade), population (migration models), and physical geography (Strahler's quantitative geomorphology, stream ordering). In India it shaped work at Indian universities on urban hierarchy and regionalisation, and planning tools such as composite indices of backwardness.
Diagram: Flow chart: Schaefer (1953) → positivism → models and statistics → spatial science (Bunge 1962, Haggett 1965, Chorley and Haggett 1967) → reactions (behavioural, radical, humanistic) → integration in GIS.
Critique: it assumed rational economic man and isotropic space; ignored values, culture and power; reduced people to points; and its models often failed in real landscapes. Harvey, once its champion (Explanation in Geography, 1969), turned to Marxism; behavioural and humanistic geographers stressed perception and meaning.
Overall, the revolution made geography scientific and policy-relevant; its excesses were corrected, not reversed, and quantitative-GIS methods remain the discipline's backbone.
Q7(c) · Regional Planning · 15 marks≈ 11 min
Regional Imbalances and Development Strategies
Explain in detail the impact of regional disparities on economic development.
हिंदी में प्रश्न
आर्थिक विकास पर प्रादेशिक भिन्नता के प्रभाव का सविस्तार वर्णन कीजिए।
Practise this question Regional Planning notes
Model answer
Paper and question: Paper I, Q7(c)
Approach: Define regional disparities and give Indian evidence, then explain in detail their impacts on economic development (efficiency, growth, migration, fiscal, social and political), with examples, and conclude with remedies.
Regional disparities are differences in income, infrastructure and human development among regions. In India, per capita income in states such as Goa, Delhi, Telangana and Karnataka is several times that of Bihar, Uttar Pradesh and Jharkhand, and NITI Aayog's Multidimensional Poverty Index (2023) shows poverty concentrated in the central and eastern states.
Impacts on economic development: (i) inefficient use of resources: lagging regions' labour and land remain underused while advanced regions face congestion and high costs; (ii) lower national growth, since a large share of the population has low purchasing power, limiting the domestic market; (iii) massive distress migration from Bihar, Uttar Pradesh and Odisha to the west and south, causing slums in destinations and loss of youth at origins; (iv) fiscal strain: richer states contribute more taxes while poorer ones depend on transfers, generating tensions over Finance Commission formulas; (v) social costs: poor health and education in lagging regions reduce human capital and the demographic dividend; (vi) political and security issues, including regional movements and Left Wing Extremism in the tribal belt of central India.
Map: Choropleth map of India by per capita net state domestic product, showing high values in the west and south and low values in the central and eastern states.
Some disparities can stimulate migration and remittances, but on balance persistent disparities slow overall development.
Remedies: targeted investment through the Aspirational Districts Programme (2018) and special packages; infrastructure such as PMGSY and dedicated freight corridors; human capital in lagging states; industrial dispersal and Finance Commission equalisation transfers; and decentralised planning.

Question 8 (50 marks)

Q8(a) · Population Geography · 20 marks≈ 14 min
Migration: Causes and Consequences
How migration is affected by push and pull factors? Explain how these factors play a role in understanding new settlement patterns.
हिंदी में प्रश्न
अभिकर्ष एवं धक्का के कारक किस प्रकार प्रवास को प्रभावित करते हैं? नवीन बस्ती प्रतिरूपों को समझने में उपरोक्त कारक किस प्रकार की भूमिका प्रस्तुत करते हैं?
Practise this question Population Geography notes
Model answer
Paper and question: Paper I, Q8(a)
Approach: Explain push and pull factors with Lee's model and examples at different scales, then show how they shape new settlement patterns (urban sprawl, slums, peri-urban growth, ethnic enclaves, frontier and resettlement colonies), with a diagram.
Migration results from the interplay of push factors that expel people from their origin and pull factors that attract them to a destination. Everett Lee's model (1966) adds intervening obstacles (distance, cost, borders, laws) and personal factors (age, education, networks), so the same conditions affect people differently.
Push factors: poverty, landlessness, unemployment, drought and floods, land degradation, conflict, caste or ethnic discrimination, and lack of schools and health care. Examples: drought in Marathwada and Bundelkhand, floods in north Bihar, and conflict in Syria and Sudan.
Pull factors: jobs and higher wages, education, health care, urban amenities, family networks and political security. Examples: Mumbai, Delhi and Surat for Indian migrants; the Gulf states for workers from Kerala and Nepal; Germany for refugees in 2015.
Effect on new settlement patterns: (i) rapid urban growth and slums where pull exceeds the city's capacity to house people, such as Dharavi in Mumbai and the unauthorised colonies of Delhi; (ii) peri-urban and satellite growth along highways, as at Gurugram, Noida and Bhiwandi, where migrants find cheaper land and jobs; (iii) ethnic and regional enclaves such as Malayali neighbourhoods in the Gulf or the Bihari labour colonies of Ludhiana and Surat; (iv) frontier settlements created by pull of new land, such as the Terai of Uttarakhand or Rondonia in Brazil; (v) refugee camps and resettlement colonies, for example Kakuma in Kenya and Partition colonies in Delhi; (vi) depopulated villages in Uttarakhand's hills, the 'ghost villages' left by out-migration.
Diagram: Lee's push-pull model connected to a sketch of a metropolitan region showing core, slum pockets, peri-urban migrant colonies along highways and depopulated rural hinterland.
Thus push and pull factors not only move people but reorganise the settlement map at both origin and destination. Planning for affordable rental housing, migrant-friendly services and balanced regional development can guide these new patterns.
Q8(b) · Models, Theories and Laws in Human Geography · 15 marks≈ 11 min
Von Thunen, Weber, Perroux-Boudeville and Rostow
Explain the relevance and applicability of Von Thunen theory of Agriculture-location in today's world.
हिंदी में प्रश्न
वर्तमान विश्व में वॉन थ्यूनेन के कृषि-स्थान सिद्धांत की प्रासंगिकता एवं प्रयोज्यता की व्याख्या कीजिए।
Practise this question Models, Theories and Laws in Human Geography notes
Model answer
Paper and question: Paper I, Q8(b)
Approach: Summarise Von Thunen's model with assumptions and rings, then assess its relevance and applicability today at local, regional and global scales with examples, and note the changes that limit it.
Von Thunen's model (1826), based on his estate at Tellow in Mecklenburg, assumed an isolated state with one central city, a uniform plain, a single mode of transport (horse cart) and profit-maximising farmers. Economic rent equals yield times (market price minus production cost) minus yield times distance times freight rate, so land uses form concentric rings: market gardening and dairying, forestry, intensive arable, arable with long fallow, three-field farming and ranching.
Relevance today: (i) peri-urban belts of dairying, vegetables and floriculture around Indian cities such as the Delhi-Gurugram fringe and Pune; (ii) village-scale intensity gradients, with manured, irrigated fields near the settlement and pasture or forest at the margins, as Chisholm (1962) showed; (iii) the bid-rent logic underlies urban land-use models (Alonso, 1964); (iv) at the global scale, Peet (1969) and Sinclair noted intensive farming near the European and North American cores and extensive grazing in Australia and Argentina.
Diagram: Von Thunen's six rings, with a modified version showing ring distortion along a navigable river.
Limitations: refrigeration, trucks and air freight have reduced the effect of distance; subsidies, irrigation, contract farming and global supply chains decide land use; and speculative urban expansion converts farmland. Sinclair (1967) even argued that near expanding cities intensity may fall because farmers expect urban conversion.
Hence the model is applicable as a conceptual tool explaining the effect of distance and rent, though rarely as a literal pattern.
Q8(c) · Settlement Geography · 15 marks≈ 11 min
Urban Hierarchy, Primate City and Rank-size Rule
Discuss the concept of 'Rank-Size-Rule' given by G. K. Zipf. Is this rule relevant in Indian context?
हिंदी में प्रश्न
जी. के. जिप्फ द्वारा दिए गए 'कोटि-आकार-नियम' संकल्पना की चर्चा कीजिए। क्या यह नियम भारतीय संदर्भ में प्रासंगिक है?
Practise this question Settlement Geography notes
Model answer
Paper and question: Paper I, Q8(c)
Approach: State Zipf's rank-size rule with formula and graph, its assumptions and variants (primate, binary), then test its relevance for India at national and state levels with examples, and conclude.
The rank-size rule, formulated by George Kingsley Zipf in Human Behavior and the Principle of Least Effort (1949), states that in an integrated urban system the population of a city of rank r equals the population of the largest city divided by r. The second city is half the size of the first, the third one-third, and so on; on a log-log graph the distribution forms a straight line with slope -1.
Zipf explained it by a balance between forces of diversification (many small centres close to resources) and unification (a few large centres).
Indian context: at the national level, India's urban agglomerations broadly follow a rank-size pattern rather than primacy. Census 2011 showed Greater Mumbai (about 18.4 million) and Delhi (about 16.3 million) close in size, followed by Kolkata, Chennai, Bengaluru and Hyderabad; the top cities are larger than the rule predicts and form a 'binary' or oligarchic top. Explanations include India's large size, federal structure, colonial multi-port development and long urban history.
Diagram: Log-log plot of India's top 20 urban agglomerations (Census 2011) against the ideal Zipf line, showing near-fit with the top two cities clustered.
At the state level, deviations are clear: West Bengal shows primacy of Kolkata, Telangana of Hyderabad and Karnataka of Bengaluru, while Uttar Pradesh and Kerala have more balanced hierarchies. Small towns are also under-counted because of census town definitions.
Hence the rule is broadly relevant for India as a whole but less so for states, and it describes rather than explains urban systems.

UPSC Mains 2022 Geography Paper II