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GS 3 · Practice archive

GS Paper 3 practice questions for UPSC Mains 2026.

Economy, Environment, Science and Technology, Internal Security, Disaster Management.

20 Qs / 250 marks439 questionsModel outlines included

GS Paper 3 · Tips & tricks

GS-3 — data first, then policy, then a concrete way forward

  1. Open with a number.GDP share, FDI inflow, emissions intensity, forest cover %, fiscal deficit — the right number in the first sentence does the work of a paragraph.
  2. Cite the latest report by name.Economic Survey, RBI Financial Stability Report, NITI Aayog SDG India Index, ISRO mission timeline — examiners can verify, so accuracy is checked.
  3. Use a flowchart for processes.Disaster cycle, ML pipeline, food-processing value chain, cybersecurity kill chain — a small labelled diagram beats prose.
  4. Distinguish stock from flow.Forex reserves vs trade balance, debt stock vs deficit, capacity installed vs energy generated. Mixing them up costs marks.
  5. Way forward must be specific.Not "the government should take steps" — name the ministry, the scheme name, the budget head, the timeline.
Q.110 marks · 150w 9 min Medium

Explain intra-generational and inter-generational issues of equity from the perspective of inclusive growth and sustainable development.

Subtopic: Environment & Ecology · Equity and sustainable development

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Introduction → define intra- and inter-generational equity and their place in sustainable development → explain intra-generational issues (present distribution) → explain inter-generational issues (future stewardship) → link to inclusive growth → Conclusion on balancing both.
Key points
  • Sustainable development (Brundtland) rests on inter- and intra-generational equity.
  • Intra-generational equity = fair resource/income/opportunity distribution within today's generation.
  • Intra issues: poverty, unequal access, environmental burden on poor (environmental justice).
  • Inter-generational equity = future generations' right to healthy environment and natural capital.
  • Inter issues: groundwater over-extraction, fossil-fuel depletion, biodiversity loss, GHGs.
  • Climate justice and CBDR embody intra-generational fairness between nations.
  • Precautionary principle and conservation safeguard inter-generational interests.
  • Inclusive growth reconciles both via green, resource-efficient development.

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Q.210 marks · 150w 9 min Medium

What are the main constraints in transport and marketing of agricultural produce in India?

Subtopic: Agriculture & Food Security · Agricultural marketing

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Introduction: efficient marketing as key to farmer incomes → constraints in transport (roads, cold chain, losses) → constraints in marketing (APMC, middlemen, information, standardisation) → brief reforms → Conclusion: integrated value-chain approach.
Key points
  • Post-harvest losses of roughly Rs 90,000 crore a year from poor logistics
  • Inadequate rural roads and last-mile connectivity to markets
  • Acute shortage of cold storage, reefer transport and warehousing for perishables
  • APMC monopoly and layers of middlemen squeeze farmers' share of consumer price
  • Lack of transparent price information and weak bargaining power of small farmers
  • Absence of grading, standardisation and institutional credit
  • Reforms: PMGSY roads, cold chains, FPOs, warehouse receipts, e-NAM integration

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Q.310 marks · 150w 9 min Medium

Define potential GDP and explain its determinants. What are the factors that have been inhibiting India from realizing its potential GDP?

Subtopic: Indian Economy · Growth and potential output

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Introduction: define potential GDP as maximum sustainable non-inflationary output → determinants (labour, capital, productivity, technology, institutions) → factors inhibiting India from realising it → Conclusion: reforms to close the gap.
Key points
  • Potential GDP = maximum sustainable output at full employment without accelerating inflation
  • Determined by labour force, capital stock and total factor productivity/technology
  • Output gap (actual minus potential) guides fiscal and monetary policy
  • India constrained by moderate investment rate and infrastructure gaps
  • Low female LFPR, large informal sector and skill deficits cap productivity
  • Twin balance-sheet legacy limited credit and private investment
  • Land, labour and regulatory rigidities plus low R&D restrain potential

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Q.410 marks · 150w 9 min Medium

What are the challenges and opportunities of food processing sector in the country? How can income of the farmers be substantially increased by encouraging food processing?

Subtopic: Agriculture & Food Security · Food processing

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Introduction: food processing as a sunrise, employment-intensive sector → challenges → opportunities → how it raises farmer incomes (value addition, reduced wastage, market access) → Conclusion: schemes-backed growth.
Key points
  • India processes only a small share of output despite being a top producer of milk, fruits and vegetables
  • Challenges: cold-chain and supply-chain gaps, wastage, fragmented holdings, credit and skill deficits
  • Opportunities: large raw-material base, rising demand, exports and employment generation
  • Value addition lets farmers earn beyond raw produce and cuts distress sales during gluts
  • Absorbs surplus/perishables, stabilising prices and reducing post-harvest losses
  • Assured backward linkages via FPOs and contract farming raise and stabilise incomes
  • Backed by PM Kisan Sampada Yojana, PLI for food processing, Operation Greens and PMFME

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Q.510 marks · 150w 9 min Easy

How is science interwoven deeply with our lives? What are the striking changes in agriculture triggered off by the science-based technologies?

Subtopic: Science & Technology · Science in agriculture and daily life

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Introduction: science pervades everyday life → illustrate its reach (health, communication, food, transport) → striking science-driven changes in agriculture → Conclusion: science for sustainable, doubled farm incomes.
Key points
  • Science underpins health (vaccines, diagnostics), communication, food safety and transport in daily life
  • Green Revolution: HYV seeds, fertilisers and irrigation made India food self-sufficient
  • Biotechnology (Bt cotton, tissue culture) raised yields and pest resistance
  • Precision farming: soil-health cards, remote sensing, drones and weather advisories
  • White Revolution (dairy) and Blue Revolution (fisheries) transformed allied sectors
  • Digital tools (e-NAM, mobile advisories) connect farmers to markets and knowledge
  • Future gains depend on sustainable, climate-smart and responsible technology

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Q.610 marks · 150w 9 min Medium

Discuss different types of cyber crimes and measures required to be taken to fight the menace.

Subtopic: Internal Security · Cyber security

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Introduction: rising cyber crime with digitalisation → types of cyber crimes (against individuals, property, state) → measures needed (legal, institutional, technical, awareness, international) → Conclusion: whole-of-society cyber resilience.
Key points
  • Cyber crimes classed as against individuals, property/organisations, and the state/society
  • Individual crimes: phishing, identity theft, UPI/financial fraud, cyberstalking, morphing
  • Organisational: hacking, ransomware, data breaches, IP theft
  • State-level: cyber terrorism, CII attacks, espionage, CSAM and misinformation
  • Legal backbone: IT Act 2000 and the Digital Personal Data Protection Act 2023
  • Institutions: CERT-In, I4C, NCIIPC, cybercrime.gov.in reporting portal
  • Awareness, trained cyber forensics and international cooperation are vital

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Q.710 marks · 150w 9 min Medium

For effective border area management, discuss the steps required to be taken to deny local support to militants and also suggest ways to manage favourable perception among locals.

Subtopic: Internal Security · Border area management and perception

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Introduction → link border management to denying local support and winning perception → steps to deny local support to militants → ways to build favourable perception among locals → Conclusion on WHAM plus development.
Key points
  • Militancy in border areas relies on local logistics, shelter and intelligence.
  • Deny support via intelligence mapping of OGWs and prompt lawful action.
  • Choke funding/supply lines — smuggling, hawala, extortion.
  • Strengthen fencing, surveillance and coordinated patrolling of infiltration corridors.
  • Village Defence Committees and community policing build local resistance.
  • Win perception through BADP and Vibrant Villages Programme development.
  • Operation Sadbhavana civic-action: medical camps, education, skilling.
  • Human-rights respect and stakeholder livelihoods (tourism, border trade) align security with development.

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Q.815 marks · 250w 14 min Hard

Explain the meaning of investment in an economy in terms of capital formation. Discuss the factors to be considered while designing a concession agreement between a public entity and a private entity.

Subtopic: Indian Economy · Capital formation and PPP concession agreements

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Introduction → define investment as capital formation → explain gross/net and fixed capital formation and its growth role → shift to concession agreements in PPP → discuss factors in designing them (risk allocation, tenure, tariff, termination, dispute resolution) → Conclusion on balancing viability and public interest.
Key points
  • Investment in economics = capital formation, not purchase of financial assets.
  • Capital formation adds to the stock of physical/productive capital over time.
  • Gross Fixed Capital Formation (GFCF) is a key growth and productivity driver.
  • Net investment = gross minus depreciation, reflecting genuine capacity expansion.
  • PPP concession agreements mobilise private capital amid fiscal constraints.
  • Design factor: optimal risk allocation to the party best able to bear each risk.
  • Concession period, regulated returns and transparent tariff/user charges.
  • Termination, hand-back, compensation and robust dispute-resolution clauses.
  • Kelkar Committee (2015) recommended fair risk-sharing and renegotiation frameworks.

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Q.915 marks · 250w 14 min Hard

Explain the rationale behind the Goods and Services Tax (Compensation to States) Act of 2017. How has COVID-19 impacted the GST compensation fund and created new federal tensions?

Subtopic: Indian Economy · GST compensation and fiscal federalism

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Introduction → GST as destination-based tax and the compensation guarantee → rationale of the Compensation to States Act 2017 → COVID-19's impact on the cess fund and shortfall → resulting federal tensions and resolution → Conclusion on cooperative federalism.
Key points
  • GST is a destination-based tax; states surrendered key indirect-tax autonomy.
  • Compensation to States Act 2017 guaranteed compensation for revenue loss.
  • States assured 14% annual growth on 2015-16 base revenue for five years (to June 2022).
  • Shortfall funded by Compensation Cess on demerit/luxury goods (tobacco, autos, aerated drinks).
  • COVID-19 depressed consumption, so cess collections fell far short of dues.
  • Centre's 'act of God' framing and split of shortfall angered states.
  • Opposition states saw erosion of the guarantee and of fiscal federalism.
  • Resolved via back-to-back borrowing and extension of cess to repay loans.

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Q.1015 marks · 250w 14 min Hard

What are the major factors responsible for making rice-wheat system a success? In spite of this success how has this system become bane in India?

Subtopic: Agriculture & Food Security · Rice-wheat cropping system

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Introduction → rice-wheat system's role in food security → factors behind its success (Green Revolution package, policy support) → how it became a bane (water depletion, soil degradation, stubble burning, monoculture, MSP distortion) → Conclusion on crop diversification.
Key points
  • Rice-wheat system on 10+ million ha of the Indo-Gangetic plains underpinned food security.
  • Success from Green Revolution HYV seeds and responsive fertiliser use.
  • Assured canal/tube-well irrigation in Punjab, Haryana, western UP.
  • Policy support: MSP, assured procurement, subsidised power, fertiliser and credit.
  • Bane: severe groundwater depletion from water-guzzling paddy in a semi-arid belt.
  • Soil degradation, nutrient mining, salinity and micronutrient decline.
  • Paddy stubble burning drives Delhi-NCR winter air pollution.
  • Monoculture and MSP distortion crowd out pulses, oilseeds and millets; solution is diversification.

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Q.1115 marks · 250w 14 min Hard

Suggest measures to improve water storage and irrigation system to make its judicious use under depleting scenario.

Subtopic: Agriculture & Food Security · Water storage and irrigation efficiency

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Introduction → India's water stress and the storage-irrigation challenge → measures to improve water storage → measures to improve irrigation and judicious use → institutional and demand-side reforms → Conclusion on 'per drop more crop'.
Key points
  • India has ~18% of world population but ~4% of freshwater; agriculture uses ~80% of water.
  • Storage: watershed works, check dams, farm ponds, revival of traditional tanks/johads.
  • Groundwater recharge via managed aquifer recharge and Atal Bhujal Yojana.
  • Complete pending projects and desilt reservoirs to restore storage capacity.
  • Micro-irrigation (drip/sprinkler) under 'Per Drop More Crop' raises water-use efficiency.
  • Canal lining and command-area development cut conveyance losses.
  • Shift from water-guzzling crops; adopt DSR and alternate wetting-drying.
  • Demand management: rational water/power pricing, metering, Water User Associations.

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Q.1215 marks · 250w 14 min Medium

Describe the benefits of deriving electric energy from sunlight in contrast to the conventional energy generation. What are the initiatives offered by our Government for this purpose?

Subtopic: Science & Technology · Renewable and solar energy

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Introduction: solar as clean alternative to fossil fuels → benefits over conventional generation (environment, economics, energy security, decentralisation) → limitations to acknowledge → Government initiatives (missions, schemes, institutional push) → Conclusion: solar central to Panchamrit and net-zero pathway.
Key points
  • Solar is renewable, emission-free and increasingly cheaper than new thermal power (tariffs near Rs 2/unit)
  • Cuts import dependence on coal/oil, strengthening energy security and saving forex
  • Enables decentralised, off-grid electrification of remote and farm areas
  • Advances Paris Agreement, Panchamrit targets and net-zero by 2070
  • National Solar Mission with 500 GW non-fossil capacity target by 2030
  • PM-KUSUM (solar pumps) and PM Surya Ghar rooftop scheme empower farmers and households
  • Solar Parks, PLI for modules, Green Energy Corridor and International Solar Alliance
  • Challenges: intermittency, storage cost, land needs and module-import reliance

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Q.1315 marks · 250w 14 min Medium

What are the determinants of left-wing extremism in Eastern part of India? What strategy should Government of India, civil administration and security forces adopt to counter the threat in the affected areas?

Subtopic: Internal Security · Left-Wing Extremism

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Introduction: LWE as India's gravest internal-security challenge in the eastern 'Red Corridor' → determinants (socio-economic, governance, geographic, ideological) → three-tier strategy for Government, civil administration and security forces → results and way forward → Conclusion: security-development balance.
Key points
  • LWE concentrated in the eastern 'Red Corridor' tribal-forest belt
  • Root causes: tribal alienation, land/forest rights denial, displacement, underdevelopment and governance vacuum
  • Terrain (dense forests) and Maoist ideology plus extortion sustain the movement
  • Government of India: SAMADHAN doctrine, road/telecom connectivity, financial inclusion, Aspirational Districts
  • Civil administration must deliver FRA, PESA, rehabilitation and grievance redressal
  • Security forces: intelligence-led CRPF/CoBRA/state-police operations, choking funding, surrender-rehab policy
  • Balanced security-plus-development approach has reduced affected districts markedly

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Q.1415 marks · 250w 14 min Medium

Analyze internal security threats and transborder crimes along Myanmar, Bangladesh and Pakistan borders including Line of Control (LoC). Also discuss the role played by various security forces in this regard.

Subtopic: Internal Security · Border management

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Introduction: borders with Myanmar, Bangladesh and Pakistan (incl. LoC) as varied security challenges → threat profile on each front → role of security forces on each → measures for management → Conclusion: technology-plus-diplomacy approach.
Key points
  • Myanmar border: NE insurgents, Golden Triangle drugs, arms/gold smuggling; Free Movement Regime a concern
  • Bangladesh border: illegal migration, cattle and FICN smuggling, human trafficking, porous riverine terrain
  • Pakistan/LoC: terrorism, infiltration, narco-terrorism, drone drops and counterfeit currency
  • Assam Rifles guards Myanmar frontier and aids NE counter-insurgency
  • BSF mans Bangladesh and Pakistan international borders; Army holds the LoC
  • CIBMS smart fencing, anti-drone grids and border infrastructure as key measures
  • Intelligence sharing (MAC) and neighbourhood diplomacy complement physical security

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Q.1510 marks · 150w 9 min Medium

Explain the difference between computing methodology of India’s Gross Domestic Product (GDP) before the year 2015 and after the year 2015.

Subtopic: Indian Economy · National income accounting

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Introduction: 2015 revision of GDP series → change in base year → shift from factor cost to market prices/GVA → new corporate data source (MCA-21) → implications → Conclusion: better-aligned, globally comparable estimates.
Key points
  • 2015 revision by CSO aligned accounts with SNA 2008 standards
  • Base year changed from 2004-05 to 2011-12
  • Headline shifted from GDP at factor cost to GDP at market prices
  • GVA at basic prices used for sectoral analysis: GVA + product taxes - product subsidies = GDP
  • Adoption of enterprise-level MCA-21 corporate database over older sample data
  • Better coverage of the organised corporate sector and greater comparability
  • New series showed higher growth, prompting debate on methodology and comparability

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Q.1610 marks · 150w 9 min Medium

Distinguish between Capital Budget and Revenue Budget. Explain the components of both these Budgets.

Subtopic: Indian Economy · Government budgeting and public finance

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Introduction → basis of distinction → Revenue Budget and its components → Capital Budget and its components → significance → Conclusion
Key points
  • Distinction rests on whether transactions affect government assets/liabilities: revenue account (no change) vs capital account (change).
  • Revenue receipts = tax revenue (income, corporate, GST, customs) + non-tax revenue (interest, dividends, fees).
  • Revenue expenditure is recurring: salaries, pensions, interest, subsidies; creates no asset.
  • Capital receipts create liabilities or reduce assets: borrowings, external loans, disinvestment.
  • Capital expenditure creates assets or repays loans: infrastructure, machinery, debt repayment.
  • Revenue deficit = revenue expenditure minus revenue receipts.
  • Capex is growth-enhancing; high revenue deficit signals borrowing for consumption.

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Q.1710 marks · 150w 9 min Medium

How did land reforms in some parts of the country help to improve the socio-economic conditions of marginal and small farmers?

Subtopic: Indian Economy · Land reforms and agrarian equity

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Introduction → components of land reforms → how they helped marginal/small farmers → regional successes → limits → Conclusion
Key points
  • Land reforms comprised abolition of intermediaries, tenancy reform, land ceilings and consolidation.
  • Ending zamindari removed exploitative rent extraction and linked tillers to the state.
  • Security of tenure and rent regulation curbed eviction and incentivised investment.
  • Ceiling-surplus redistribution gave marginal farmers an asset base and social dignity.
  • West Bengal's Operation Barga protected sharecroppers and raised their produce share.
  • Kerala's tenancy laws conferred ownership, sharply cutting landlessness.
  • Uneven implementation and weak land records limited gains in most states.

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Q.1810 marks · 150w 9 min Medium

How and to what extent would micro-irrigation help in solving India’s water crisis?

Subtopic: Agriculture & Food Security · Micro-irrigation and water use efficiency

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Introduction → India's water crisis → how micro-irrigation helps → extent and limits → way forward → Conclusion
Key points
  • Agriculture consumes ~80% of India's freshwater, mostly via inefficient flood irrigation.
  • Micro-irrigation raises efficiency to 70-90%, saving 30-50% of water.
  • Fertigation boosts yields while cutting fertiliser and energy costs.
  • Reduces groundwater over-exploitation in Punjab, Haryana, Maharashtra.
  • Suited to undulating, sandy terrain and horticulture crops.
  • Extent limited by high upfront cost, fragmented holdings, unsuitability for paddy.
  • Best paired with crop diversification, watershed management and rational power pricing.

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Q.1910 marks · 150w 9 min Medium

How is S-400 air defence system technically superior to any other system presently available in the world?

Subtopic: Science & Technology · S-400 air defence system

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Introduction → what S-400 is → technical superiorities (range, multi-target, radar, mobility) → strategic value for India → limits → Conclusion
Key points
  • S-400 Triumf is a Russian long-range mobile SAM system; India contracted five squadrons in 2018.
  • Engages targets up to ~400 km range and ~30 km altitude via a family of missiles.
  • Tracks dozens of targets, engages multiple simultaneously over 360 degrees.
  • Counters aircraft, cruise and ballistic missiles, drones and stealth targets.
  • Powerful phased-array radars detect low-observable threats; deploys in minutes.
  • Road-mobile launchers improve survivability against pre-emptive strikes.
  • Limits: saturation/swarm vulnerability, Russian supply dependence, CAATSA sanction risk.

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Q.2010 marks · 150w 9 min Medium

Discuss how emerging technologies and globalisation contribute to money laundering. Elaborate measures to tackle the problem of money laundering both at national and international levels.

Subtopic: Indian Economy · Money laundering in a globalised, digital economy

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Introduction → money laundering and its stages → tech and globalisation as enablers → national measures → international measures → Conclusion
Key points
  • Money laundering has three stages: placement, layering, integration.
  • Cryptocurrencies and digital wallets enable pseudonymous, borderless layering.
  • Fintech and online banking allow instant cross-border and trade-based laundering.
  • Globalisation, tax havens and shell companies ease integration and round-tripping.
  • National tools: PMLA, Enforcement Directorate, Financial Intelligence Unit, KYC.
  • Regulate virtual digital assets and enforce beneficial-ownership disclosure.
  • International: FATF compliance, MLATs, Egmont Group information exchange.

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