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Previous Year Questions/UPSC Prelims 2015

UPSC Prelims 2015 — solved PYQs

107 previous year questions from the 2015 UPSC Prelims paper, organised by subject — each solved with option-by-option explanations.

2015 PYQs by subject

  • Current Affairs15 PYQs
  • Indian Economy28 PYQs
  • Environment18 PYQs
  • Geography10 PYQs
  • History & Culture16 PYQs
  • Polity & Governance13 PYQs
  • Science7 PYQs

Solved questions

A selection of 25 solved questions — sign up free to practise all 107.

Q1Polity & Governance·DPSPs and Fundamental DutiesPYQ 2015

The ideal of 'Welfare State' in the Indian Constitution is enshrined in its:

  • APreamble
  • BDirective Principles of State PolicyCorrect
  • CFundamental Rights
  • DSeventh Schedule

Explanation

Correct. The Directive Principles of State Policy lay down the social and economic obligations of the State and are the principal constitutional basis of the welfare-state ideal, guiding governance toward social justice and material well-being.

Q2History & Culture·Late Freedom Struggle (1939-1947)PYQ 2015

With reference to the Cabinet Mission, which of the following statements is/are correct? 1. It recommended a federal government. 2. It enlarged the powers of the Indian courts. 3. It provided for more Indians in the ICS. Select the correct answer using the code given below.

  • A1 onlyCorrect
  • B2 and 3 only
  • C1 and 3 only
  • DNone

Explanation

Correct. The Cabinet Mission Plan recommended a three-tier federal structure for India: provinces at the bottom, groups of provinces in the middle, and a union at the top dealing with defence, foreign affairs, and communications.

Q3Current Affairs·International Relations and Groupings in NewsPYQ 2015

In the Mekong-Ganga Cooperation, an initiative of six countries, which of the following is/are not a participant/participants? 1. Bangladesh 2. Cambodia 3. China 4. Myanmar 5. Thailand Select the correct answer using the code given below:

  • A1 only
  • B2, 3 and 4
  • C1 and 3Correct
  • D1, 2 and 5

Explanation

Correct. Mekong-Ganga Cooperation includes India, Thailand, Myanmar, Cambodia, Laos and Vietnam. Bangladesh and China are not participants.

Q4History & Culture·Early Medieval IndiaPYQ 2015

Consider the following pairs: Medieval Indian State - Present Region 1. Champaka - Central India 2. Durgara - Jammu 3. Kuluta - Malabar Which of the above pairs is/are correctly matched?

  • A1 and 2
  • B2 onlyCorrect
  • C1 and 3
  • D3 only

Explanation

Correct. Durgara is the ancient name for the Jammu region in the western Himalayas. Champaka refers to Chamba (not Central India), and Kuluta corresponds to the Kullu valley (not Malabar).

Q5Current Affairs·Miscellaneous Multi-Subject Current AffairsPYQ 2015

Among the following, which were frequently mentioned in the news for the outbreak of Ebola virus recently?

  • ASyria and Jordan
  • BGuinea, Sierra Leone and LiberiaCorrect
  • CPhilippines and Papua New Guinea
  • DJamaica, Haiti and Surinam

Explanation

Correct. The 2014 West African Ebola outbreak was centred in Guinea, Sierra Leone, and Liberia, killing over 11,000 people.

Q6Polity & Governance·Political Theory and Comparative ConceptsPYQ 2015

There is a Parliamentary System of Government in India because the:

  • ALok Sabha is elected directly by the people.
  • BParliament can amend the Constitution.
  • CRajya Sabha cannot be dissolved.
  • DCouncil of Ministers is responsible to the Lok Sabha.Correct

Explanation

Correct. The defining institutional marker of a parliamentary system is that the executive (Council of Ministers) is collectively responsible to the popularly elected lower house (Lok Sabha) and must retain its confidence to remain in office.

Q7Geography·Indian Drainage SystemsPYQ 2015

Consider the following rivers: 1. Vamsadhara 2. Indravati 3. Pranahita 4. Pennar Which of the above are tributaries of Godavari?

  • A1, 2 and 3
  • B2, 3 and 4
  • C1, 2 and 4
  • D2 and 3 onlyCorrect

Explanation

Correct. The Indravati and Pranahita are major tributaries of the Godavari. The Indravati joins the Godavari in Chhattisgarh, and the Pranahita (formed by the confluence of the Wainganga and Wardha) joins it in Maharashtra-Telangana. Vamsadhara and Pennar are independent river systems.

Q8Indian Economy·Industry & InfrastructurePYQ 2015

Among the Eight Core Industries, which one has the highest weight in the index?

  • ACoal
  • BElectricityCorrect
  • CSteel
  • DCrude oil

Explanation

Correct. Electricity generation carries the highest weight (about 19.85%) in the Eight Core Industries index.

Q9Indian Economy·Industry & InfrastructurePYQ 2015

Which of the following pairs is correctly matched with Geographical Indication (GI) status?

  • ABanaras Brocades and Sarees - GI registeredCorrect
  • BTirupati Laddu - not a GI
  • CPochampally Ikat - not a GI
  • DDarjeeling Tea - not a GI

Explanation

Correct. Banaras Brocades and Sarees have GI recognition.

Q10Geography·OceanographyPYQ 2015

Tides occur in oceans and seas due to which of the following? 1. Gravitational Force of the Sun 2. Gravitational Force of the Moon 3. Gravitational Force of the Earth Select the correct answer using the code given below.

  • A1 only
  • B2 and 3 only
  • C1 and 3 only
  • D1, 2 and 3Correct

Explanation

Correct. Tides result from the combined gravitational effects of the Moon (primary), the Sun, and Earth's own gravitational field. The interaction of all three produces the tidal bulges.

Q11Current Affairs·International Relations and Groupings in NewsPYQ 2015

'Beijing Declaration and Platform for Action', often seen in the news, is:

  • AA strategy to tackle the regional terrorism, an outcome of a meeting of the Shanghai Cooperation Organization
  • BA plan of action for sustainable economic growth in the Asia-Pacific Region, an outcome of deliberations of the Asia-Pacific Economic Forum
  • CAn agenda for women's empowerment, an outcome of a World Conference convened by the United NationsCorrect
  • DA strategy to combat wildlife trafficking, a declaration of the East Asia Summit

Explanation

Correct. The Beijing Declaration and Platform for Action emerged from the 1995 UN Fourth World Conference on Women and remains a key framework for women's empowerment and gender equality.

Q12Indian Economy·Monetary Policy & BankingPYQ 2015

Rupee convertibility means the ability to:

  • AConvert rupees freely into foreign currencies subject to the applicable convertibility regimeCorrect
  • BUse only gold to settle international transactions
  • CExchange rupees only within India
  • DFix the rupee permanently to the U.S. dollar

Explanation

Correct. Convertibility refers to the freedom to convert domestic currency into foreign currency under the prevailing rules.

Q13Environment·Climate Change SciencePYQ 2015

With reference to an organization known as 'BirdLife International', which of the following statements is/are correct? 1. It is a Global Partnership of Conservation Organizations. 2. The concept of 'biodiversity hotspots' originated from this organization. 3. It identifies the sites known/referred to as 'Important Bird and Biodiversity Areas'. Select the correct answer using the code given below.

  • A1 only
  • B2 and 3 only
  • C1 and 3 onlyCorrect
  • D1, 2 and 3

Explanation

Correct. BirdLife International is a global partnership of conservation NGOs (Statement 1) and it identifies Important Bird and Biodiversity Areas worldwide (Statement 3). The hotspots concept came from Norman Myers.

Q14Indian Economy·International Economic OrganizationsPYQ 2015

The 'Fortaleza Declaration' is associated with which of the following groupings?

  • AASEAN
  • BBRICSCorrect
  • COECD
  • DWTO

Explanation

Correct. The Fortaleza Declaration was issued at the 6th BRICS Summit in 2014, which also announced the establishment of the New Development Bank and the Contingent Reserve Arrangement.

Q15Indian Economy·AgriculturePYQ 2015

Which one of the following best captures the purpose of Fair and Remunerative Price (FRP) in the sugar sector?

  • ATo set a support price for sugarcane that sugar mills are expected to pay farmersCorrect
  • BTo regulate the retail price of tea
  • CTo fix import tariff on crude oil
  • DTo determine the exchange rate of the rupee

Explanation

Correct. FRP is the benchmark price fixed for sugarcane payable by sugar mills to farmers.

Q16Science·Chemistry in Everyday LifePYQ 2015

With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements: 1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products. 2. Fuel cells can be used for powering buildings and not for small devices like laptop computers. 3. Fuel cells produce electricity in the form of Alternating Current (AC). Which of the statements given above is/are correct?

  • A1 onlyCorrect
  • B2 and 3 only
  • C1 and 3 only
  • D1, 2 and 3

Explanation

Correct. When pure hydrogen reacts with oxygen in a fuel cell, the only by-products are heat and water. Fuel cells can power devices of all sizes (not just buildings), and they produce DC, not AC.

Q17Indian Economy·Industry & InfrastructurePYQ 2015

The Index of Eight Core Industries covers which of the following? 1. Coal 2. Crude oil 3. Natural gas 4. Refinery products 5. Fertilizers 6. Steel 7. Cement 8. Electricity Select the correct answer using the code given below:

  • A1, 2, 5, 6, 7 and 8 only
  • B1, 2, 3, 4, 5, 6, 7 and 8Correct
  • C1, 3, 5, 7 and 8 only
  • D2, 4, 6 and 8 only

Explanation

Correct. All eight listed industries form the Index of Eight Core Industries, with electricity having the highest weight.

Q18Geography·Places in News and Map-Based GeographyPYQ 2015

Which one of the following countries of South-West Asia does not open out to the Mediterranean Sea?

  • ASyria
  • BJordanCorrect
  • CLebanon
  • DIsrael

Explanation

Correct. Jordan is the only country among the options that does not have a Mediterranean coastline. Its only sea access is through the Gulf of Aqaba on the Red Sea.

Q19Polity & Governance·Federalism and Local GovernancePYQ 2015

The provisions in the Fifth Schedule and Sixth Schedule in the Constitution of India are made in order to:

  • AProtect the interests of Scheduled TribesCorrect
  • BDetermine the boundaries between States
  • CDetermine the powers, authorities, and responsibilities of Panchayats
  • DProtect the interests of all the border States

Explanation

Correct. The Fifth and Sixth Schedules create special administrative arrangements for tribal areas and tribal populations, especially Scheduled Tribes. The Fifth Schedule covers Scheduled Areas in most States, while the Sixth Schedule covers autonomous tribal regions in the northeastern States.

Q20Science·BiotechnologyPYQ 2015

With reference to the use of nanotechnology in health sector, which of the following statements is/are correct? 1. Targeted drug delivery is made possible by nanotechnology. 2. Nanotechnology can largely contribute to gene therapy. Select the correct answer using the code given below.

  • A1 only
  • B2 only
  • CBoth 1 and 2Correct
  • DNeither 1 nor 2

Explanation

Correct. Nanoparticles enable targeted drug delivery to specific cells/tissues, and they also serve as non-viral vectors for gene therapy by carrying therapeutic DNA into cells.

Q21Indian Economy·AgriculturePYQ 2015

Which one of the following is the best explanation of the Seed Village concept?

  • AA programme to train farmers in producing and maintaining quality seeds locallyCorrect
  • BA policy for shifting all villages to plantation crops only
  • CAn urban warehousing initiative for imported food items
  • DA social forestry programme unrelated to agriculture

Explanation

Correct. The Seed Village concept aims to encourage local production and timely availability of quality seeds through trained farmers.

Q22Environment·Ecology BasicsPYQ 2015

Which one of the following is the best description of the term 'ecosystem'?

  • AA community of organisms interacting with one another
  • BThat part of the Earth which is inhabited by living organisms
  • CA community of organisms together with the environment in which they liveCorrect
  • DThe flora and fauna of a geographical area

Explanation

Correct. An ecosystem comprises both the community of living organisms (biotic) and the physical environment (abiotic factors) they interact with.

Q23Indian Economy·Basic Concepts of EconomicsPYQ 2015

With reference to the Indian economy, consider the following statements: 1. The rate of growth of Real Gross Domestic Product has steadily increased in the last decade. 2. The Gross Domestic Product at market prices (in rupees) has steadily increased in the last decade. Which of the statements given above is/are correct?

  • A1 only
  • B2 onlyCorrect
  • CBoth 1 and 2
  • DNeither 1 nor 2

Explanation

Correct. Nominal GDP at market prices (in rupees) generally shows a steady upward trend because it reflects both real economic growth and inflation. Even when real growth fluctuates, the combined effect of positive real growth and general price increases leads to a steady rise in nominal GDP.

Q24Environment·Agriculture, Biotechnology and EnvironmentPYQ 2015

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture? 1. Proliferation of nitrogen-fixing microorganisms in soil can occur. 2. Increase in the acidity of soil can take place. 3. Leaching of nitrate to the ground-water can occur. Select the correct answer using the code given below.

  • A1 and 3 only
  • B2 only
  • C2 and 3 onlyCorrect
  • D1, 2 and 3

Explanation

Correct. Ammonium-based fertilizers release hydrogen ions during nitrification, acidifying soil, and excess nitrate leaches into groundwater causing pollution.

Q25History & Culture·Indian Nationalism (1885-1919)PYQ 2015

Which one of the following movements contributed to a split in the Indian National Congress resulting in the emergence of 'moderates' and 'extremists'?

  • ASwadeshi MovementCorrect
  • BQuit India Movement
  • CNon-Cooperation Movement
  • DCivil Disobedience Movement

Explanation

Correct. The Swadeshi Movement (1905-1908) sharpened differences over strategy and pace of agitation, culminating in the Surat split between moderates and extremists in 1907.

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