Q1.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2026, GS Paper IEasy
- A.1 only
- B.1 and 2
- C.2 and 3
- D.3 only
Show answer
Correct answer: A. 1 only
The yearly return of the falcons to Doyang is a story of community conservation, not of technology or of the birds settling in India.
Read the full explanation →Q2.General ScienceAsked in: UPSC Civil Services · CSE Prelims 2024, GS Paper IMedium
- A.Only one
- B.Only two
- C.All three
- D.None
Show answer
Correct answer: C. All three
Each of the three groups includes species that carry toxins in their bodies to deter predators. Butterflies: the Monarch butterfly feeds as a caterpillar on milkweed and stores its bitter cardiac glycosides, so birds that eat it fall sick; its bright orange colour is a warning.
Read the full explanation →Q3.Indian EconomyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IMedium
- A.Only one
- B.Only two
- C.Only three
- D.All four
Show answer
Correct answer: C. Only three
Brand recognition, intellectual property and a client mailing list have no physical form, while inventory is a stock of physical goods.
Read the full explanation →Q4.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IEasy
- A.Cotton
- B.Rice
- C.Sugarcane
- D.Wheat
Show answer
Correct answer: B. Rice
Flooded paddy fields release methane, and the nitrogen fertiliser used on them releases nitrous oxide, so rice is the main crop source of both gases.
Read the full explanation →Q5.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2021, GS Paper IHard
- A.1, 2 and 4
- B.1, 3 and 5
- C.3 and 4
- D.2 and 5
Show answer
Correct answer: A. 1, 2 and 4
The declaration was launched at the 2014 UN Climate Summit, sets a timeline to end forest loss and has a mixed set of endorsers, but it is voluntary and India did not sign it.
Read the full explanation →Q6.Indian HistoryAsked in: UPSC Civil Services · CSE Prelims 2020, GS Paper IMedium
- A.1 and 2 only
- B.2 and 3 only
- C.3 only
- D.1, 2 and 3
Show answer
Correct answer: C. 3 only
Only the third pairing is right: Kalidasa is traditionally placed at the court of Chandragupta II Vikramaditya. Tradition counts Kalidasa, author of Abhijnanashakuntalam, Meghaduta and Raghuvamsha, among the nine gems (navaratnas) of King Vikramaditya, identified with the Gupta ruler Chandragupta II of the late fourth and early fifth century CE.
Read the full explanation →Q7.GeographyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IEasy
- A.does not set below the horizon at the Arctic Circle
- B.does not set below the horizon at Antarctic Circle
- C.shines vertically overhead at noon on the Equator
- D.shines vertically overhead at the Tropic of Capricorn
Show answer
Correct answer: A. does not set below the horizon at the Arctic Circle
21 June is the summer solstice of the Northern Hemisphere, when the North Pole is tilted towards the Sun and the whole Arctic Circle gets 24 hours of daylight.
Read the full explanation →Q8.Indian PolityAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IHard
- A.1 and 2
- B.2 only
- C.1 and 3
- D.3 only
Show answer
Correct answer: B. 2 only
Only statement 2 is right: under the RTE Act a primary teacher must clear a Teacher Eligibility Test held as per NCTE guidelines.
Read the full explanation →Q9.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IMedium
- A.1 and 2 only
- B.2 and 3 only
- C.3 only
- D.1, 2 and 3
Show answer
Correct answer: B. 2 and 3 only
The real hurdles are the high technology needed to build algae plants and the very large scale they need to pay off; algae can be grown on land.
Read the full explanation →Q10.Indian EconomyAsked in: UPSC Civil Services · CSE Prelims 2026, GS Paper IEasy
- A.1 only
- B.1 and 2
- C.2 and 3
- D.3 only
Show answer
Correct answer: D. 3 only
RAD aims to raise productivity and cut climate risk in rainfed farming by promoting Integrated Farming Systems. The National Mission for Sustainable Agriculture is one of the missions under India's National Action Plan on Climate Change.
Read the full explanation →Q11.General ScienceAsked in: UPSC Civil Services · CSE Prelims 2024, GS Paper IMedium
- A.Only one
- B.Only two
- C.All three
- D.None
Show answer
Correct answer: A. Only one
Of the three, only red sanders is native to India; cashew and papaya were brought from the Americas. Red sanders (Pterocarpus santalinus) is endemic to the southern Eastern Ghats, mainly the Seshachalam and nearby hills of Andhra Pradesh.
Read the full explanation →Q12.Indian EconomyAsked in: UPSC Civil Services · CSE Prelims 2023, GS Paper IMedium
- A.Only two
- B.Only three
- C.Only four
- D.All five
Show answer
Correct answer: B. Only three
Besides population, area and income distance, the Fifteenth Finance Commission used demographic performance, forest and ecology, and tax and fiscal efforts.
Read the full explanation →Q13.GeographyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IMedium
- A.1 and 2 only
- B.2 and 3 only
- C.1 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3
SRI saves seed, cuts methane and, by using less irrigation water, saves the electricity spent on pumping. The System of Rice Intensification was developed in Madagascar in the 1980s by the French priest Henri de Laulanié.
Read the full explanation →Q14.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2021, GS Paper IHard
- A.1, 2, 3 and 5 only
- B.1, 2 and 4 only
- C.3, 4 and 5 only
- D.1, 2, 3, 4 and 5
Show answer
Correct answer: B. 1, 2 and 4 only
Magnetite nanoparticles in polluted air come from high-temperature combustion and friction: vehicle engines, brake wear and power plants. Magnetite is an iron oxide (Fe3O4).
Read the full explanation →Q15.Science & TechnologyAsked in: UPSC Civil Services · CSE Prelims 2020, GS Paper IMedium
- A.fertilization of egg in vitro by the donor sperm
- B.genetic modification of sperm producing cells
- C.development of stem cells into functional embryos
- D.prevention of mitochondrial diseases in offspring
Show answer
Correct answer: D. prevention of mitochondrial diseases in offspring
Pronuclear transfer is a mitochondrial replacement technique that stops a mother from passing faulty mitochondria to her child. Mitochondria have their own small DNA, inherited only from the mother; defects in it cause serious muscle, heart and brain diseases.
Read the full explanation →Q16.GeographyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IMedium
- A.Tobacco, cocoa and rubber
- B.Tobacco, cotton and rubber
- C.Cotton, coffee and sugarcane
- D.Rubber, coffee and wheat
Show answer
Correct answer: A. Tobacco, cocoa and rubber
Tobacco, cocoa and rubber all come from the Americas and spread to Asia, Africa and Europe after Columbus. The exchange of plants and animals between the Americas (New World) and Afro-Eurasia (Old World) after 1492 is called the Columbian Exchange.
Read the full explanation →Q17.Art & CultureAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IMedium
- A.1 only
- B.1 and 2
- C.3 only
- D.2 and 3
Show answer
Correct answer: B. 1 and 2
Chapchar Kut belongs to Mizoram and Khongjom Parba to Manipur, but Thang-Ta is from Manipur, not Sikkim. Chapchar Kut is the spring festival of the Mizos, held in March after the bamboo and forest are cut and left to dry for jhum cultivation; Cheraw, the bamboo dance, is its highlight.
Read the full explanation →Q18.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IMedium
- A.1 and 3 only
- B.2 only
- C.2 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: B. 2 only
GIAHS exists to identify and safeguard traditional farming systems together with their landscapes, agrobiodiversity and local knowledge. The Food and Agriculture Organization launched the GIAHS programme in 2002, at the World Summit on Sustainable Development in Johannesburg.
Read the full explanation →Q19.General ScienceAsked in: UPSC Civil Services · CSE Prelims 2024, GS Paper IMedium
- A.1 and 2 only
- B.2 and 3 only
- C.1 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: B. 2 and 3 only
RTGs power spacecraft using heat from the natural decay of plutonium-238; they are not reactors and involve no fission. In an RTG, a radioactive isotope gives off heat as it decays on its own.
Read the full explanation →Q20.GeographyAsked in: UPSC Civil Services · CSE Prelims 2022, GS Paper IHard
- A.Lake Victoria
- B.Lake Faguibine
- C.Lake Oguta
- D.Lake Volta
Show answer
Correct answer: B. Lake Faguibine
Lake Faguibine in northern Mali, once one of the largest lakes of West Africa, has dried up and turned into desert.
Read the full explanation →Q21.General ScienceAsked in: UPSC Civil Services · CSE Prelims 2021, GS Paper IEasy
- A.Catfish
- B.Octopus
- C.Oyster
- D.Pelican
Show answer
Correct answer: C. Oyster
The oyster feeds by drawing water over its gills and straining out plankton and organic particles, which is filter feeding.
Read the full explanation →Q22.Environment & EcologyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IMedium
- A.1 only
- B.2 only
- C.1 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: A. 1 only
Only the Asiatic lion survives in the wild in India alone, in the Gir landscape of Gujarat. The Asiatic lion once ranged from West Asia to central India, but today its only wild population lives in and around Gir National Park and the nearby districts of Saurashtra in Gujarat.
Read the full explanation →Q23.Indian PolityAsked in: UPSC Civil Services · CSE Prelims 2018, GS Paper IMedium
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
Show answer
Correct answer: A. 1 only
The 2006 Act did replace the 1954 Act, but FSSAI is an independent statutory authority, not an office under the Director General of Health Services.
Read the full explanation →Q24.Indian HistoryAsked in: UPSC Civil Services · CSE Prelims 2017, GS Paper IMedium
- A.1 only
- B.2 only
- C.Both 1 and 2
- D.Neither 1 nor 2
Show answer
Correct answer: B. 2 only
Only statement 2 is right: Narayan Meghaji Lokhande is regarded as the father of the labour movement in India. Lokhande, an associate of Jyotirao Phule, organised the textile mill workers of Bombay and in 1890 founded the Bombay Mill Hands Association, often called India's first labour organisation.
Read the full explanation →Q25.GeographyAsked in: UPSC Civil Services · CSE Prelims 2016, GS Paper IEasy
- A.1 only
- B.2 and 3 only
- C.1 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3
Dibang, Kameng and Lohit all flow from Arunachal Pradesh into the Brahmaputra.
Read the full explanation →Q26.GeographyAsked in: UPSC Civil Services · CSE Prelims 2026, GS Paper IEasy
- A.1 and 2
- B.1 and 3
- C.2 and 3
- D.3 and 4
Show answer
Correct answer: B. 1 and 3
Bahrain and Qatar have coasts only on the Persian Gulf, whose sole outlet to the Indian Ocean is the Strait of Hormuz.
Read the full explanation →Q27.General ScienceAsked in: UPSC Civil Services · CSE Prelims 2024, GS Paper IMedium
- A.Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
- B.Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
- C.Statement-I is correct, but Statement-II is incorrect
- D.Statement-I is incorrect, but Statement-II is correct
Show answer
Correct answer: D. Statement-I is incorrect, but Statement-II is correct
Massive giant stars burn their fuel so fast that they live much shorter lives than dwarf stars, so Statement I is false and Statement II is true.
Read the full explanation →Q28.Indian PolityAsked in: CDS · CDS-II 2026, GKHard
- A.1 only
- B.3 only
- C.1 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: C. 1 and 3 only
Article 213 requires a Governor's ordinance to be laid before the state legislature and lets the Governor withdraw it at any time, but its life after reassembly is six weeks, not two months.
Read the full explanation →Q29.General ScienceAsked in: CDS · CDS-I 2026, GKMedium
- A.The resistivity of the conductor increases if the length of the wire is increased.
- B.The resistivity of the conductor decreases if the length of the wire is increased.
- C.The resistivity of the conductor remains the same if the length of the wire is changed.
- D.The resistivity of the conductor increases if the cross-sectional area of the wire is increased.
Show answer
Correct answer: C. The resistivity of the conductor remains the same if the length of the wire is changed.
Resistivity is a property of the material itself, so it stays the same when the length of the wire is changed.
Read the full explanation →Q30.General ScienceAsked in: CDS · CDS-II 2025, GKEasy
- A.Cu
- B.Au
- C.Sn
- D.Na
Show answer
Correct answer: D. Na
Sodium is so reactive that carbon cannot reduce its compounds, so it is obtained by passing electricity through molten sodium chloride.
Read the full explanation →Q31.General ScienceAsked in: CDS · CDS-II 2024, GKEasy
- A.prevent fast evaporation, until hydration has proceeded well
- B.protect the concrete structure from contamination by dust particles
- C.prevent development of any fungus on the surface
- D.give smoother and cleaner surface over cement structure
Show answer
Correct answer: A. prevent fast evaporation, until hydration has proceeded well
Wet straw or gunny bags keep the fresh concrete moist, so water does not evaporate before the cement has hydrated properly.
Read the full explanation →Q32.Indian HistoryAsked in: CDS · CDS-II 2023, GKMedium
- A.Odisha
- B.Bihar
- C.Telangana
- D.West Bengal
Show answer
Correct answer: A. Odisha
Vikramkhol is a rock shelter near Belpahar in the Jharsuguda district of western Odisha. The shelter is known for a long panel of engraved and painted signs on its rock wall.
Read the full explanation →Q33.General ScienceAsked in: CDS · CDS-II 2022, GKMedium
- A.Light energy is directly converted to kinetic energy which oxidizes carbon dioxide.
- B.Light energy is directly converted to chemical energy which causes reduction of water.
- C.Chlorophyll absorbs the chemical energy of light which causes oxidation of carbon dioxide.
- D.Chlorophyll absorbs light energy which causes splitting of water molecules and reduction of carbon dioxide.
Show answer
Correct answer: D. Chlorophyll absorbs light energy which causes splitting of water molecules and reduction of carbon dioxide.
Chlorophyll absorbs light energy, which is used to split water and then to reduce carbon dioxide to sugar. In the light reactions, energy trapped by chlorophyll splits water molecules (photolysis), releasing oxygen, hydrogen ions and electrons and producing ATP and NADPH.
Read the full explanation →Q34.General ScienceAsked in: CDS · CDS-I 2022, GKEasy
- A.It is made up of cellulose.
- B.It is a permeable structure for all substances.
- C.It is flexible and enables the cell to engulf many materials.
- D.It does not allow diffusion of gases like oxygen and carbon dioxide.
Show answer
Correct answer: C. It is flexible and enables the cell to engulf many materials.
The cell membrane is flexible, and this lets a cell fold it around food and other material and take it in.
Read the full explanation →Q35.General ScienceAsked in: CDS · CDS-II 2021, GKEasy
- A.0.22 W
- B.2.2 W
- C.22 W
- D.220 W
Show answer
Correct answer: C. 22 W
Electric power is voltage multiplied by current, and 110 V × 0.2 A = 22 W. Power is the rate at which electrical energy is used.
Read the full explanation →Q36.Indian EconomyAsked in: CDS · CDS-I 2021, GKMedium
- A.It is a skill training programme.
- B.It is for rural youth from poor families.
- C.Its objective is placement in wage employment.
- D.It relies entirely on skill training by Government agencies.
Show answer
Correct answer: D. It relies entirely on skill training by Government agencies.
Deen Dayal Upadhyaya Grameen Kaushalya Yojana does not rely only on government agencies; most of its training is run by private and non-government partners.
Read the full explanation →Q37.Indian HistoryAsked in: CDS · CDS-II 2020, GKHard
- A.1 only
- B.1 and 2 only
- C.2 and 3 only
- D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3
Annie Besant, Sarojini Naidu and Hirabai Tata all went before the Joint Select Committee in London in 1919 to argue for votes for Indian women.
Read the full explanation →Q38.General ScienceAsked in: CDS · CDS-I 2020, GKEasy
- A.Scoliodon
- B.Salamander
- C.Pigeon
- D.Human being
Show answer
Correct answer: B. Salamander
A salamander is an amphibian, and amphibians have a heart with two atria and one ventricle. Heart chambers increase along the vertebrate groups.
Read the full explanation →Q39.GeographyAsked in: CDS · CDS-II 2019, GKEasy
- A.Ganga
- B.Tista
- C.Barak
- D.Brahmaputra
Show answer
Correct answer: D. Brahmaputra
Flowing east across Tibet as the Tsangpo, the river bends sharply around Namcha Barwa and turns south into Arunachal Pradesh.
Read the full explanation →Q40.General ScienceAsked in: CDS · CDS-I 2018, GKMedium
- A.1, 2 and 3
- B.2 and 3 only
- C.1 and 2 only
- D.1 only
Show answer
Correct answer: D. 1 only
A body in equilibrium has no net force and no net moment on it, while neither momentum nor kinetic energy is conserved in every situation.
Read the full explanation →Q41.General ScienceAsked in: CDS · CDS-II 2017, GKEasy
- A.Calcium carbonate
- B.Calcium oxide
- C.Calcium nitrate
- D.Calcium sulphate
Show answer
Correct answer: A. Calcium carbonate
A pearl is built up from layers of nacre, which is mostly calcium carbonate held together by a protein called conchiolin.
Read the full explanation →Q42.General ScienceAsked in: CDS · CDS-I 2017, GKEasy
- A.Vitamin C
- B.Vitamin K
- C.Vitamin D
- D.Vitamin B
Show answer
Correct answer: A. Vitamin C
These are the signs of scurvy, the disease caused by a lack of vitamin C (ascorbic acid). Vitamin C is needed to make collagen, the protein that holds together gums, skin, blood vessels and bone.
Read the full explanation →Q43.General ScienceAsked in: CDS · CDS-II 2016, GKEasy
- A.Coal
- B.Diamond
- C.Graphite
- D.Graphene
Show answer
Correct answer: A. Coal
Coal is an impure fossil fuel containing hydrogen, oxygen, nitrogen and sulphur besides carbon, so it is not a pure form of the element.
Read the full explanation →Q44.Static GKAsked in: CDS · CDS-II 2026, GKMedium
- A.India, Cambodia, Lao PDR, Myanmar, Thailand and Vietnam
- B.India, Bangladesh, Lao PDR, Myanmar, Thailand and Vietnam
- C.India, Bangladesh and Myanmar
- D.India, Bangladesh, Myanmar and Sri Lanka
Show answer
Correct answer: A. India, Cambodia, Lao PDR, Myanmar, Thailand and Vietnam
Mekong-Ganga Cooperation brings together India and the five Mekong basin countries: Cambodia, Lao PDR, Myanmar, Thailand and Vietnam. The grouping was launched at Vientiane in Laos in 2000.
Read the full explanation →Q45.General ScienceAsked in: CDS · CDS-I 2026, GKMedium
- A.A primary cell is rechargeable.
- B.A secondary cell can be used only once.
- C.The emf of a battery is the power provided by the battery per unit current.
- D.The unit of emf is Joule.
Show answer
Correct answer: C. The emf of a battery is the power provided by the battery per unit current.
The emf of a battery equals the power it supplies divided by the current it drives, because power P = EI.
Read the full explanation →Q46.General ScienceAsked in: CDS · CDS-II 2025, GKMedium
- A.It is the thinnest material known so far.
- B.It is almost completely transparent.
- C.It is highly conducting.
- D.It is a wide band-gap semiconductor.
Show answer
Correct answer: D. It is a wide band-gap semiconductor.
Graphene is not a wide band-gap semiconductor; it has practically zero band gap and behaves like a semimetal.
Read the full explanation →Q47.GeographyAsked in: CDS · CDS-I 2025, GKMedium
- A.1, 2, 3, 4
- B.1, 2, 4, 3
- C.2, 1, 4, 3
- D.2, 1, 3, 4
Show answer
Correct answer: D. 2, 1, 3, 4
Going south from Central Asia one crosses the Kunlun, then the Karakoram, then the Ladakh Range and then the Zaskar Range.
Read the full explanation →Q48.General ScienceAsked in: CDS · CDS-II 2024, GKMedium
- A.Hydrogen has 3 isotopes.
- B.Helium is a commonly used gas in electric bulbs.
- C.Oxygen is used to burn fuel in rocket engines in spacecraft.
- D.Nitrogen can be used in gaseous form to replace air in food packaging.
Show answer
Correct answer: B. Helium is a commonly used gas in electric bulbs.
Filament bulbs are commonly filled with argon, often mixed with nitrogen, not helium. An inert gas in a filament bulb slows the evaporation of the hot tungsten filament.
Read the full explanation →Q49.Indian HistoryAsked in: CDS · CDS-II 2023, GKMedium
- A.The Bill for the Indian Independence Act was introduced in Parliament on July 4 and received the Royal Assent on July 18, 1947.
- B.Act of 1947 laid down the basic framework of the Indian Constitution.
- C.The Act provided for the establishment of two independent Dominions to be known as India and Pakistan.
- D.The Act empowered the Constituent Assembly of each Dominion to have unlimited power to frame and adopt any constitution.
Show answer
Correct answer: B. Act of 1947 laid down the basic framework of the Indian Constitution.
The Indian Independence Act ended British rule but did not lay down the framework of the Constitution; that framework came largely from the Government of India Act, 1935.
Read the full explanation →Q50.Indian States & UTsAsked in: CDS · CDS-I 2023, GKMedium
- A.Karnataka
- B.Andhra Pradesh
- C.Assam
- D.Chhattisgarh
Show answer
Correct answer: C. Assam
Assam is called the land of the red river and blue hills, the red river being the silt-laden Brahmaputra and the blue hills those that ring its valley.
Read the full explanation →