UPSC Prelims 2018 Question Paper & Solutions

UPSC Prelims 2018 solved question paper — GS Paper 1 and CSAT with full explanations, subject-wise breakdown, and the official cutoff.

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UPSC Prelims 2018 solved paper

Every question from the official paper with the correct answer and a full explanation. Click any row to open the detailed solution.

General Studies — Paper 1

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QQuestionSubjectAnswerSolution
1Consider the following statements: 1. In the first Lok Sabha, the single largest party in the opposition was the Swatantra Party. 2. In the …polity-and-governanceBView
2Which of the following leaf modifications occur(s) in the desert areas to inhibit water loss? 1. Hard and waxy leaves 2. Tiny leaves 3. Thor…geographyDView
3As per the NSSO 70th Round "Situation Assessment Survey of Agricultural Households", consider the following statements: 1. Rajasthan has the…economyCView
4How is the National Green Tribunal (NGT) different from the Central Pollution Control Board (CPCB)? 1. The NGT has been established by an Ac…polity-and-governanceBView
5Consider the following statements: 1. The Parliament of India can place a particular law in the Ninth Schedule of the Constitution of India.…polity-and-governanceAView
6Which one of the following best describes the term "Merchant Discount Rate" sometimes seen in news?economyCView
7What is/are the consequence/consequences of a country becoming the member of the 'Nuclear Suppliers Group'? 1. It will have access to the la…science-and-technologyAView
8With reference to India's decision to levy an equalization tax of 6% on online advertisement services offered by non-resident entities, whic…economyDView
9Consider the following statements: 1. The Fiscal Responsibility and Budget Management (FRBM) Review Committee Report has recommended a debt …economyCView
10Consider the following statements: 1. The quantity of imported edible oils is more than the domestic production of edible oils in the last f…economyAView
11He wrote biographies of Mazzini, Garibaldi, Shivaji and Shrikrishna; stayed in America for some time; and was also elected to the Central As…historyCView
12Consider the following statements: 1. Aadhaar card can be used as a proof of citizenship or domicile. 2. Once issued, Aadhaar number cannot …polity-and-governanceDView
13Which of the following has/have shrunk immensely/dried up in the recent past due to human activities? 1. Aral Sea 2. Black Sea 3. Lake Baika…geographyAView
14"Rule of Law Index" is released by which of the following?polity-and-governanceDView
15Which one of the following links all the ATMs in India?economyCView
16Consider the following statements: 1. Capital Adequacy Ratio (CAR) is the amount that banks have to maintain in the form of their own funds …economyAView
17The identity platform 'Aadhaar' provides open "Application Programming Interfaces (APIs)". What does it imply? 1. It can be integrated into …polity-and-governanceCView
18Very recently, in which of the following countries have lakhs of people either suffered from severe famine/acute malnutrition or died due to…polity-and-governanceDView
19Regarding Wood's Dispatch, which of the following statements are true? 1. Grants-in-Aid system was introduced. 2. Establishment of universit…historyAView
20With reference to the Parliament of India, which of the following Parliamentary Committees scrutinizes and reports to the House whether the …polity-and-governanceBView
21Consider the following statements: 1. As per the Right to Education (RTE) Act, to be eligible for appointment as a teacher in a State, a per…polity-and-governanceBView
22Consider the following pairs: Tradition State 1. Chapchar Kut festival Mizoram 2. Khongjom Parba ballad Manipur 3. Thang-Ta dance Sikkim Whi…art-and-cultureBView
23Consider the following statements: 1. The Food Safety and Standards Act, 2006 replaced the Prevention of Food Adulteration Act, 1954. 2. The…polity-and-governanceAView
24The term "two-state solution" is sometimes mentioned in the news in the context of the affairs ofpolity-and-governanceBView
25With reference to the provisions made under the National Food Security Act, 2013, consider the following statements : 1. The families coming…polity-and-governanceBView
26India enacted The Geographical Indications of Goods (Registration and Protection) Act, 1999 in order to comply with the obligations topolity-and-governanceDView
27Consider the following statements: 1. In India, State Governments do not have the power to auction non-coal mines. 2. Andhra Pradesh and Jha…economyDView
28With reference to digital payments, consider the following statements: 1. BHIM app allows the user to transfer money to anyone with a UPI-en…economyAView
29Among the following cities, which one lies on a longitude closest to that of Delhi?geographyAView
30International Labour Organization's Conventions 138 and 182 are related topolity-and-governanceAView
31Regarding Money Bill, which of the following statements is not correct?polity-and-governanceCView
32With reference to the election of the President of India, consider the following statements: 1. The value of the vote of each MLA varies fro…polity-and-governanceAView
33In the Indian context, what is the implication of ratifying the 'Additional Protocol' with the 'International Atomic Energy Agency (IAEA)'?science-and-technologyAView
34Consider the following countries: 1. Australia 2. Canada 3. China 4. India 5. Japan 6. USA Which of the above are among the 'free-trade part…polity-and-governanceCView
35With reference to the 'Global Alliance for Climate-Smart Agriculture (GACSA)', which of the following statements is/are correct? 1. GACSA is…geographyBView
36Which of the following is/are the aim/aims of "Digital India" Plan of the Government of India? 1. Formation of India's own Internet companie…polity-and-governanceBView
37Consider the following pairs: Towns sometimes mentioned in news Country 1. Aleppo Syria 2. Kirkuk Yemen 3. Mosul Palestine 4. Mazar-i-sharif…geographyBView
38In the Federation established by The Government of India Act of 1935, residuary powers were given to thepolity-and-governanceBView
39Consider the following statements: 1. The Speaker of the Legislative Assembly shall vacate his/her office if he/she ceases to be a member of…polity-and-governanceAView
40Which one of the following reflects the most appropriate relationship between law and liberty?polity-and-governanceBView
41Consider the following statements: 1. No criminal proceedings shall be instituted against the Governor of a State in any court during his te…polity-and-governanceCView
42The well-known painting "Bani Thani" belongs to theart-and-cultureDView
43What is "Terminal High Altitude Area Defense (THAAD)", sometimes seen in the news?science-and-technologyCView
44With reference to cultural history of India, consider the following statements: 1. Most of the Tyagaraja Kritis are devotional songs in prai…art-and-cultureBView
45Which of the following are regarded as the main features of the "Rule of Law"? 1. Limitation of powers 2. Equality before law 3. People's re…polity-and-governanceCView
46Which one of the following statements correctly describes the meaning of legal tender money?economyBView
47If a commodity is provided free to the public by the Government, theneconomyCView
48Increase in absolute and per capita real GNP do not connote a higher level of economic development, ifeconomyCView
49Human capital formation as a concept is better explained in terms of a process which enables 1. individuals of a country to accumulate more …economyCView
50Despite being a high saving economy, capital formation may not result in significant increase in output due toeconomyDView
51After the Santhal Uprising subsided, what was/were the measure/measures taken by the colonial government? 1. The territories called 'Santhal…historyCView
52Economically, one of the results of the British rule in India in the 19th century was thehistoryCView
53If the President of India exercises his power as provided under Article 356 of the Constitution in respect of a particular State, thenpolity-and-governanceBView
54Consider the following pairs: Craft Heritage of 1. Puthukkuli shawls Tamil Nadu 2. Sujni embroidery Maharashtra 3. Uppada Jamdani saris Karn…art-and-cultureAView
55In which of the following areas can GPS technology be used? 1. Mobile phone operations 2. Banking operations 3. Controlling the power grids …science-and-technologyDView
56Consider the following statements: 1. The Reserve Bank of India manages and services Government of India Securities but not any State Govern…economyCView
57Consider the following statements: 1. The Earth's magnetic field has reversed every few hundred thousand years. 2. When the Earth was create…geographyCView
58The terms 'WannaCry, Petya and EternalBlue' sometimes mentioned in the news recently are related toscience-and-technologyCView
59With reference to the circumstances in Indian agriculture, the concept of "Conservation Agriculture" assumes significance. Which of the foll…geographyCView
60The term "sixth mass extinction/sixth extinction" is often mentioned in the news in the context of the discussion ofgeographyDView
61With reference to the Indian Regional Navigation Satellite System (IRNSS), consider the following statements: 1. IRNSS has three satellites …science-and-technologyAView
62Consider the following phenomena : 1. Light is affected by gravity. 2. The Universe is constantly expanding. 3. Matter warps its surrounding…science-and-technologyDView
63With reference to the Genetically Modified mustard (GM mustard) developed in India, consider the following statements: 1. GM mustard has the…science-and-technologyBView
64Consider the following pairs: Terms sometimes seen in news Context/Topic 1. Belle II experiment Artificial Intelligence 2. Blockchain techno…science-and-technologyBView
65Which of the following statements best describes "carbon fertilization"?geographyAView
66When the alarm of your smartphone rings in the morning, you wake up and tap it to stop the alarm which causes your geyser to be switched on …science-and-technologyBView
67With reference to solar power production in India, consider the following statements : 1. India is the third largest in the world in the man…economyDView
68The staple commodities of export by the English East India Company from Bengal in the middle of the 18th century werehistoryDView
69Which one of the following is a very significant aspect of the Champaran Satyagraha?historyCView
70Who among the following were the founders of the "Hind Mazdoor Sabha" established in 1948?historyDView
71With reference to the religious practices in India, the "Sthanakvasi" sect belongs toart-and-cultureBView
72With reference to the cultural history of India, consider the following statements: 1. White marble was used in making Buland Darwaza and Kh…art-and-cultureDView
73Which one of the following foreign travellers elaborately discussed about diamonds and diamond mines of India?historyBView
74With reference to Indian history, who among the following is a future Buddha, yet to come to save the world?art-and-cultureCView
75Which one of the following statements does not apply to the system of Subsidiary Alliance introduced by Lord Wellesley?historyCView
76Which of the following led to the introduction of English Education in India? 1. Charter Act of 1813 2. General Committee of Public Instruct…historyDView
77Which one of the following is an artificial lake?geographyAView
78With reference to Pradhan Mantri Kaushal Vikas Yojana, consider the following statements: 1. It is the flagship scheme of the Ministry of La…economyCView
79In 1920, which of the following changed its name to "Swarajya Sabha"?historyAView
80Which among the following events happened earliest ?historyBView
81Which of the following is/are the possible consequence/s of heavy sand mining in riverbeds? 1. Decreased salinity in the river 2. Pollution …geographyBView
82With reference to agricultural soils, consider the following statements: 1. A high content of organic matter in soil drastically reduces its…geographyBView
83The Partnership for Action on Green Economy (PAGE), a UN mechanism to assist countries transition towards greener and more inclusive economi…geographyBView
84"3D printing" has applications in which of the following? 1. Preparation of confectionery items 2. Manufacture of bionic ears 3. Automotive …science-and-technologyDView
85Consider the following statements: 1. The Barren Island volcano is an active volcano located in the Indian territory. 2. Barren Island lies …geographyAView
86Why is a plant called Prosopis juliflora often mentioned in news?geographyBView
87Consider the following statements : 1. Most of the world's coral reefs are in tropical waters. 2. More than one-third of the world's coral r…geographyDView
88"Momentum for Change: Climate Neutral Now" is an initiative launched bygeographyCView
89With reference to educational institutions during colonial rule in India, consider the following pairs: Institution Founder 1. Sanskrit Coll…historyBView
90Consider the following pairs: Regions sometimes mentioned in news Country 1. Catalonia Spain 2. Crimea Hungary 3. Mindanao Philippines 4. Or…geographyCView
91Consider the following events: 1. The first democratically elected communist party government formed in a State in India. 2. India's then la…historyBView
92Right to Privacy is protected as an intrinsic part of Right to Life and Personal Liberty. Which of the following in the Constitution of Indi…polity-and-governanceCView
93Consider the following: 1. Areca nut 2. Barley 3. Coffee 4. Finger millet 5. Groundnut 6. Sesamum 7. Turmeric The Cabinet Committee on Econo…economyBView
94In which one of the following States is Pakhui Wildlife Sanctuary located?geographyAView
95With reference to India's satellite launch vehicles, consider the following statements: 1. PSLVs launch the satellites useful for Earth reso…science-and-technologyAView
96With reference to the governance of public sector banking in India, consider the following statements: 1. Capital infusion into public secto…economyBView
97Consider the following items : 1. Cereal grains hulled 2. Chicken eggs cooked 3. Fish processed and canned 4. Newspapers containing advertis…economyCView
98Consider the following statements: 1. The definition of "Critical Wildlife Habitat" is incorporated in the Forest Rights Act, 2006. 2. For t…polity-and-governanceAView
99Consider the following: 1. Birds 2. Dust blowing 3. Rain 4. Wind blowing Which of the above spread plant diseases ?geographyDView
100With reference to organic farming in India, consider the following statements: 1. 'The National Programme for Organic Production' (NPOP) is …economyBView

CSAT — Paper 2 (qualifying)

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QQuestionSubjectAnswerSolution
1Consider the following sum: • +1• +2• +• 3 + • 1 = 21• In the above sum, • stands forQuantitative AptitudeDView
2Consider the following pattern of numbers: 8 10 15 13 6 5 7 4 4/6 6/11 8/16 8/? What is the number at ? in the above pattern?Logical ReasoningAView
3How many diagonals can be drawn by joining the vertices of an octagon?Quantitative AptitudeAView
4A train 200 metres long is moving at the rate of 40 kmph. In how many seconds will it cross a man standing near the railway line?Quantitative AptitudeDView
5Global population was around 1.6 billion in 1990- today it is around 7.2 billion and growing. Recent estimates on population growth predict …Reading ComprehensionAView
6Many pathogens that cause foodborne illnesses are unknown. Food contamination can occur at any stage from farm to plate. Since most cases of…Reading ComprehensionAView
7Though I have discarded much of past tradition and custom, and am anxious that India should rid herself of all shackles that bind and contai…Reading ComprehensionDView
8I am a scientist, privileged to be somebody who tries to understand nature using the tools of science. But it is also clear that there are s…Reading ComprehensionBView
9It is no longer enough for us to talk about providing for universal access to education. Making available schooling facilities is an essenti…Reading ComprehensionCView
10It is no longer enough for us to talk about providing for universal access to education. Making available schooling facilities is an essenti…Reading ComprehensionAView
11It is no longer enough for us to talk about providing for universal access to education. Making available schooling facilities is an essenti…Reading ComprehensionDView
12It is no longer enough for us to talk about providing for universal access to education. Making available schooling facilities is an essenti…Reading ComprehensionCView
13If LSJXVC is the code for MUMBAI, the code for DELHI isLogical ReasoningAView
14If RAMON is written as 12345 and DINESH as 675849, then HAMAM will be written asLogical ReasoningBView
15If X is between -3 and -1, and Y is between -1 and 1, then X ² - Y² is in between which of the following?Quantitative AptitudeDView
16X and Y are natural numbers other than 1, and Y is greater than X. Which of the following represents the largest number?Quantitative AptitudeAView
17The plan of an office block for six officers A, B, C, D, E and F is as follows: Both B and C occupy offices to the right of the corridor (as…Logical ReasoningCView
18The plan of an office block for six officers A, B, C, D, E and F is as follows: Both B and C occupy offices to the right of the corridor (as…Logical ReasoningAView
19Desertification is a term used to explain a process of decline in the biological productivity of an ecosystem, leading to total loss of prod…Reading ComprehensionDView
20Desertification is a term used to explain a process of decline in the biological productivity of an ecosystem, leading to total loss of prod…Reading ComprehensionAView
21Desertification is a term used to explain a process of decline in the biological productivity of an ecosystem, leading to total loss of prod…Reading ComprehensionDView
22A diversity of natural assets will be needed to cope with climate change and ensure productive agriculture, forestry, and fisheries. For exa…Reading ComprehensionBView
23A diversity of natural assets will be needed to cope with climate change and ensure productive agriculture, forestry, and fisheries. For exa…Reading ComprehensionCView
24Today, the top environmental challenge is a combination of people and their aspirations. If the aspirations are more like the frugal ones we…Reading ComprehensionCView
25Some people believe that leadership is a quality which you have at birth or not at all. This theory is false, for the art of leadership can …Reading ComprehensionBView
26A number consists of three digits of which the middle one is zero and their sum is 4. If the number formed by interchanging the first and la…Quantitative AptitudeBView
27A solid cube of 3 cm side, painted on all its faces, is cut up into small cubes of 1 cm side. How many of the small cubes will have exactly …Quantitative AptitudeAView
28While writing all the numbers from 700 to 1000, how many numbers occur in which the digit at hundred's place is greater than the digit at te…Quantitative AptitudeCView
29If Pen Cap, then which one of the following is always true?Logical ReasoningBView
30A bookseller sold 'a' number of Geography textbooks at the rate of Rs. x per book, 'a + 2' number of History textbooks at the rate of Rs. (x…Quantitative AptitudeBView
31A bag contains 15 red balls and 20 black balls. Each ball is numbered either 1 or 2 or 3. 20% of the red balls are numbered 1 and 40% of the…Quantitative AptitudeBView
32Two persons, A and B are running on a circular track. At the start, B is ahead of A and their positions make an angle of 30° at the centre o…Quantitative AptitudeAView
33A student has to get 40% marks to pass in an examination. Suppose he gets 30 marks and fails by 30 marks, then what are the maximum marks in…Quantitative AptitudeCView
3419 boys turn out for playing hockey. Of these, 11 are wearing hockey shirts and 14 are wearing hockey pants. There are no boys without shirt…Quantitative AptitudeCView
35A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studyi…Logical ReasoningBView
36A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studyi…Logical ReasoningAView
37A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studyi…Logical ReasoningBView
38A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studyi…Logical ReasoningAView
39A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studyi…Logical ReasoningDView
40A, B, C and D are students. They are studying in four different cities, viz., P, Q, R and S (not necessarily in that order). They are studyi…Logical ReasoningAView
41All actions to address climate change ultimately involve costs. Funding is vital in order for countries like India to design and implement a…Reading ComprehensionCView
42Cooking with biomass and coal in India is now recognized to cause major health problems, with women and children in poor populations facing …Reading ComprehensionDView
43Scientific knowledge has its dangers, but so has every great thing. Over and beyond the dangers with which it threatens the present, it open…Reading ComprehensionAView
44The Arctic's vast reserves of fossil fuel, fish and minerals are now accessible for a longer period in a year. But unlike Antarctica, which …Reading ComprehensionBView
45Being a member of the WTO, India is bound by the agreements that have been signed and ratified by its members, including itself. According t…Reading ComprehensionCView
46India's educational system is modelled on the mass education system that developed in the 19th century in Europe and later spread around the…Reading ComprehensionBView
47The practice of dieting has become an epidemic; everyone is looking out for a way to attain that perfect body. We are all different with res…Reading ComprehensionDView
48Monoculture carries great risks. A single disease or pest can wipe out swathes of the world's food production, an alarming prospect given th…Reading ComprehensionAView
49A shopkeeper sells an article at Rs. 40 and gets X% profit. However, when he sells it at Rs. 20, he faces same percentage of loss. What is t…Quantitative AptitudeCView
50There are 24 equally spaced points lying on the circumference of a circle. What is the maximum number of equilateral triangles that can be d…Quantitative AptitudeCView
51Consider the sequence given below: 4/12/95, 1/1/96, 29/1/96, 26/2/96, _ _ _ _ _ What is the next term of the series?Logical ReasoningBView
52Twelve equal squares are placed to fit in a rectangle of diagonal 5 cm. There are three rows containing four squares each. No gaps are left …Quantitative AptitudeCView
53A lift has the capacity of 18 adults or 30 children. How many children can board the lift with 12 adults?Quantitative AptitudeBView
54A person bought a refrigerator worth Rs. 22,800 with 12.5% interest compounded yearly. At the end of first year he paid Rs. 8,650 and at the…Quantitative AptitudeDView
55Lakshmi, her brother, her daughter and her son are badminton players. A game of doubles is about to begin: (i) Lakshmi's brother is directly…Logical ReasoningAView
56Directions: The following table gives the GDP growth rate and Tele- density data of different States of a country in a particular year. Stud…Quantitative AptitudeCView
57Directions: The following table gives the GDP growth rate and Teldensity data of different States of a country in a particular year. Study t…Reading ComprehensionDView
58If x - y = 8 , then which of the following must be true? 1. Both x and y must be positive for any value of x and y . 2. If x is positive, y …Quantitative AptitudeDView
59Read the following passage and answer the item that follows. Your answer to this item should be based on the passage only. The quest for che…Reading ComprehensionDView
60Read the following passage and answer the item that follows. Your answer to this item should be based on the passage only. A male tiger was …Reading ComprehensionBView
61Read the following passage and answer the item that follows. Your answer to this item should be based on the passage only. A male tiger was …Reading ComprehensionAView

Official cutoff — 2018

The cutoff UPSC announced for that year.

Official UPSC Prelims 2018 GS Paper 1 cutoff (out of 200). CSAT qualifying threshold remained 66/200.

General
98.00
EWS
OBC
96.66
SC
84.00
ST
83.34

Subject-wise weightage

How GS Paper 1 distributed marks across History, Polity, Geography, Economy, Science & Tech, Environment and Current Affairs.

  • polity-and-governance26 (26%)
  • economy21 (21%)
  • geography20 (20%)
  • history14 (14%)
  • science-and-technology12 (12%)
  • art-and-culture7 (7%)

Frequently asked questions

Where can I download the UPSC Prelims 2018 question paper?
Every question from the official UPSC Prelims 2018 GS Paper 1 and CSAT paper is reproduced above with the correct answer and a detailed explanation. UPSC also hosts scanned PDFs of all four sets on upsc.gov.in under the "Examinations" section.
What was the official cutoff for UPSC Prelims 2018?
The General category cutoff for UPSC Prelims 2018 was 98.00 marks out of 200 (GS Paper 1 only). The official cutoff strip above lists every category — EWS, OBC, SC, ST and PwBD subcategories.
How is the UPSC Prelims 2018 paper scored?
GS Paper 1 had 100 questions worth 2 marks each (200 total) with 0.66 negative marking. CSAT had 80 questions worth 2.5 marks each (200 total) with 0.83 negative marking. Only GS Paper 1 marks count towards the cutoff; CSAT had to be cleared at 33%.
Are Set A, B, C and D papers different?
No. UPSC distributes four shuffled versions with identical content but different question orders. Our archive shows the canonical order — the questions are the same regardless of which set you wrote.
Can I use the UPSC Prelims 2018 paper for current practice?
Yes. PYQ revision is one of the highest-yield activities for current aspirants. UPSC reuses themes and concepts every few years, so working through 2018 questions sharpens both content recall and the elimination strategy that UPSC's MCQ format rewards.
Were any answers in the UPSC official key for that year challenged?
UPSC accepts written objections to its provisional answer key during a fixed window each year. A small number of questions across most years are dropped or have answers changed in the final key — the version shown above reflects UPSC's final accepted answers.
Is CSAT counted in the Prelims cutoff?
No. CSAT (Paper 2) is qualifying only — you must score 33% (66 of 200 marks) to qualify, but the merit cutoff is decided entirely by GS Paper 1 marks.
How do I practice UPSC Prelims 2018 questions in test mode?
Click any row in the answer key to open the full-solution page. Each question carries subject and topic tags so you can build subject-wise revision sets, and the test generator (linked from the header) can compose a timed mock from any year or subject.