Science and Technology Prelims PYQs, 2022 to 2026

1. UPSC Prelims 2026, Question 41
   Which of the following statements with regard to genetic medicine is/are correct?
   1. Genetic medicines correct/compensate for the faulty genes responsible for disease.
   2. Engineered viruses and lipid nanoparticles are used as carriers of the genetic medicine.
   3. Genetic medicines alter the entire DNA sequence.
   Select the answer using the code given below:
   1. 1 only
   2. 2 and 3 only
   3. 1 and 2 only
   4. 1, 2 and 3
2. UPSC Prelims 2026, Question 42
   Which of the following statements with regard to Large Language Models (LLMs) used in machine learning is/are correct?
   1. LLMs assign probabilities to the next possible words and then pick the one with the highest probability.
   2. LLMs process data through mathematical optimization to minimise prediction errors.
   3. LLMs produce unbiased outputs.
   Select the answer using the code given below:
   1. 1 only
   2. 1 and 2 only
   3. 2 and 3 only
   4. 1, 2 and 3
3. UPSC Prelims 2026, Question 43
   Which of the following statements with regard to stealth technology is/are correct?
   1. Stealth objects have a very small radar cross-section and are coated with Radar Absorbing Material.
   2. Stealth objects can be detected using specific frequencies.
   3. Stealth objects are coated with metamaterials to increase the scattering of electromagnetic radiation.
   Select the answer using the code given below:
   1. 1 only
   2. 2 and 3 only
   3. 1 and 2 only
   4. 1, 2 and 3
4. UPSC Prelims 2026, Question 44
   Which of the following statements with regard to Black Boxes used in modern aircrafts is/are correct?
   1. They carry a beacon emitting red light pulses to facilitate underwater detection.
   2. They record both the cockpit voice and flight data.
   3. Their memory units are made using either stainless steel or titanium.
   Select the answer using the code given below:
   1. 1 only
   2. 2 and 3 only
   3. 1 and 2 only
   4. 1, 2 and 3
5. UPSC Prelims 2026, Question 45
   Which of the following statements with regard to Green Hydrogen is/are correct?
   1. It is decarbonized hydrogen obtained from natural gas reforming combined with carbon capture and storage (CCS).
   2. It is produced using electrolysis of water with electricity generated by renewable energy.
   3. National Green Hydrogen Mission of India aims for abatement of nearly 50 MMT of annual greenhouse gas emissions by 2030.
   Select the answer using the code given below:
   1. 1 only
   2. 2 and 3 only
   3. 2 only
   4. 1, 2 and 3
6. UPSC Prelims 2026, Question 46
   Consider the following statements with regard to involvement of private entities in India’s space programme:
   1. The Indian National Space Promotion and Authorisation Centre (IN-SPACe) is an autonomous agency formed to facilitate participation of private entities.
   2. Agnikul Cosmos launched the world’s first flight using 3D-printed rocket engine.
   3. Skyroot Aerospace has developed liquid fuel for GSLV.
   Which of the statements given above is/are correct?
   1. 1 only
   2. 2 and 3 only
   3. 1 and 2 only
   4. 1, 2 and 3
7. UPSC Prelims 2026, Question 47
   Which of the following statements with regard to drone swarms is/are correct?
   1. They use Terahertz band of frequency to communicate with the command centre.
   2. Individual drones in the swarm can communicate with other drones in the swarm.
   3. GPS Spoofing is a commonly used technique to counter drone swarm attack.
   Select the answer using the code given below:
   1. 1 only
   2. 2 and 3 only
   3. 1 and 2 only
   4. 1, 2 and 3
8. UPSC Prelims 2026, Question 48
   Which of the following statements with regard to GenomeIndia Project is/are correct?
   1. It is a part of the Human Genome Project.
   2. The project is funded by the Department of Biotechnology (DBT), Government of India.
   3. Its primary aim is to build a catalogue of genetic diversity of the Indian population.
   Select the answer using the code given below:
   1. 1 only
   2. 2 and 3 only
   3. 1 and 2 only
   4. 1, 2 and 3
9. UPSC Prelims 2026, Question 49
   Which of the following statements with regard to the National Quantum Mission (NQM) is/are correct?
   1. It aims at developing intermediate-scale quantum computers with 50-1000 physical qubits.
   2. Its implementation includes setting up of four Thematic Hubs (T-Hubs) in academic and national R&D institutes across India.
   Select the answer using the code given below:
   1. 1 only
   2. 2 only
   3. Both 1 and 2
   4. Neither 1 nor 2
10. UPSC Prelims 2026, Question 50
    Which of the following statements with regard to India’s Deep Ocean Mission is/are correct?
    1. It was launched by the Ministry of Ports, Shipping and Waterways, Government of India.
    2. Matsya-6000 has been designed to carry 3 people for deep sea exploration.
    3. Samudrayaan is a project under this mission.
    Select the answer using the code given below:
    1. 1 only
    2. 2 and 3 only
    3. 1 and 2 only
    4. 1, 2 and 3
11. UPSC Prelims 2026, Question 60
    Consider the following statements about Mission Sudarshan Chakra of India:
    1. It aims to enhance India’s air defence, ballistic missile defence and aerial offensive capabilities.
    2. This Mission is being designed to enhance rapid, precise, and powerful defence responses, reinforcing India’s strategic autonomy.
    3. One of the aims of this Mission is to cover all public places of India by an expanded nationwide security shield by 2035.
    Which of the statements given above is/are correct?
    1. 1, 2 and 3
    2. 1 and 2 only
    3. 2 and 3 only
    4. 1 only
12. UPSC Prelims 2026, Question 65
    Consider the following statements with respect to the AI Impact Summit, 2026 held in New Delhi:
    1. The Summit’s intellectual framework was based on three foundational Sutras: People, Planning, and Progress.
    2. The Preamble of the Summit stresses Democratising AI Resources, which acknowledges the Charter for Democratic Diffusion of AI as a binding framework to support locally relevant innovation and strengthen resilient AI ecosystems while respecting national laws.
    3. The New Delhi Declaration on AI Impact was structured around seven Chakras (Pillars), which included Access for Social Empowerment, AI for Science, and Secure and Trusted AI.
    Which of the statements given above is/are correct?
    1. 1, 2 and 3
    2. 1 and 2 only
    3. 2 and 3 only
    4. 3 only
13. UPSC Prelims 2026, Question 68
    Which of the following items of defence hardware is/are manufactured in India?
    1. Su-30 MKI Fighter Jets
    2. T-90 MK-III Tanks
    3. Akula Class Submarine
    Select the answer using the code given below:
    1. 1 and 2
    2. 1 and 3
    3. 1 only
    4. 2 only
14. UPSC Prelims 2026, Question 73
    Which one of the following pairs is not correctly matched?
    (Indian Army Corps : Headquarters)
    1. 3 Corps : Dimapur
    2. 4 Corps : Tezpur
    3. 14 Corps : Leh
    4. 33 Corps : Srinagar
15. UPSC Prelims 2026, Question 79
    Which of the following statements about DHRUV64 is/are correct?
    1. It is the third chip fabricated under the DIR-V Programme with an overall aim to enable the creation of microprocessors for India.
    2. It is India’s first homegrown 1.0 GHz, 64-bit dual-core microprocessor.
    Select the answer using the code given below:
    1. 1 only
    2. 2 only
    3. Both 1 and 2
    4. Neither 1 nor 2
16. UPSC Prelims 2026, Question 80
    The Bureau of Indian Standard (BIS) recently introduced a national standard to test and assess bomb disposal system. Which of the following statements with regard to this system is/are correct?
    1. The new standard is known as IS 19445 : 2025.
    2. It will improve interoperability of equipment across agencies.
    3. It was developed by TBRL, DRDO in collaboration with the 30th Central Scientific Research Institute, Russia.
    Select the answer using the code given below:
    1. 1, 2 and 3
    2. 2 and 3 only
    3. 1 and 2 only
    4. 1 only
17. UPSC Prelims 2026, Question 83
    Which one of the following pairs of semiconductor plants in India and their locations is not correctly matched?
    1. CG Power and Industrial Solutions Pvt. Ltd. in partnership with Renesas Electronics and STARS Microelectronics : Gujarat
    2. Tata Semiconductor Assembly and Test Pvt. Ltd. : Assam
    3. HCL-Foxconn Joint Venture India Chip Ltd. : Madhya Pradesh
    4. SicSem Pvt. Ltd. : Odisha
18. UPSC Prelims 2026, Question 84
    Which of the following statements with regard to India’s indigenous new high resolution weather model, the ‘Bharat Forecast System,’ is/are correct?
    1. Its objective is to generate forecasts at the Panchayats cluster level.
    2. It was developed by IIT Delhi.
    Select the answer using the code given below:
    1. 1 only
    2. 2 only
    3. Both 1 and 2
    4. Neither 1 nor 2
19. UPSC Prelims 2026, Question 86
    Which of the following statements regarding the features of blockchain technology are correct?
    1. Records stored in the database may be made visible to relevant stakeholders without risk of alteration.
    2. Copies of the entire database are stored on multiple computers on a network, syncing within seconds.
    3. Consortium blockchain is a blend of public and private blockchains allowing selective data access.
    4. Mathematical algorithms make it impossible to change or delete any data once recorded and accepted.
    Select the answer using the code given below:
    1. 1 and 3
    2. 2 and 4 only
    3. 1, 2 and 4
    4. 1 and 4 only
20. UPSC Prelims 2025, Question 41
    Consider the following types of vehicles:
    I. Full battery electric vehicles
    II. Hydrogen fuel cell vehicles
    III. Fuel cell-electric hybrid vehicles
    How many of the above are considered as alternative powertrain vehicles?
    1. Only one
    2. Only two
    3. All the three
    4. None
21. UPSC Prelims 2025, Question 42
    With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:
    I. All types of UAVs can do vertical landing.
    II. All types of UAVs can do automated hovering.
    III. All types of UAVs can use battery only as a source of power supply.
    How many of the statements given above are correct?
    1. Only one
    2. Only two
    3. All the three
    4. None
22. UPSC Prelims 2025, Question 43
    In the context of electric vehicle batteries, consider the following elements:
    I. Cobalt
    II. Graphite
    III. Lithium
    IV. Nickel
    How many of the above usually make up battery cathodes?
    1. Only one
    2. Only two
    3. Only three
    4. All the four
23. UPSC Prelims 2025, Question 44
    Consider the following:
    I. Cigarette butts
    II. Eyeglass lenses
    III. Car tyres
    How many of them contain plastic?
    1. Only one
    2. Only two
    3. All the three
    4. None
24. UPSC Prelims 2025, Question 45
    Consider the following substances:
    I. Ethanol
    II. Nitroglycerine
    III. Urea
    Coal gasification technology can be used in the production of how many of them?
    1. Only one
    2. Only two
    3. All the three
    4. None
25. UPSC Prelims 2025, Question 46
    What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about in media?
    1. These are alternatives to hydrofluorocarbon refrigerants
    2. These are explosives in military weapons
    3. These are high-energy fuels for cruise missiles
    4. These are fuels for rocket propulsion
26. UPSC Prelims 2025, Question 47
    Consider the following statements:
    I. It is expected that Majorana 1 chip will enable quantum computing.
    II. Majorana 1 chip has been introduced by Amazon Web Services (AWS).
    III. Deep learning is a subset of machine learning.
    Which of the statements given above are correct?
    1. I and II only
    2. II and III only
    3. I and III only
    4. I, II and III
27. UPSC Prelims 2025, Question 48
    With reference to monoclonal antibodies, often mentioned in news, consider the following statements:
    I. They are man-made proteins.
    II. They stimulate immunological function due to their ability to bind to specific antigens.
    III. They are used in treating viral infections like that of Nipah virus.
    Which of the statements given above are correct?
    1. I and II only
    2. II and III only
    3. I and III only
    4. I, II and III
28. UPSC Prelims 2025, Question 49
    Consider the following statements:
    I. No virus can survive in ocean waters.
    II. No virus can infect bacteria.
    III. No virus can change the cellular transcriptional activity in host cells.
    How many of the statements given above are correct?
    1. Only one
    2. Only two
    3. All the three
    4. None
29. UPSC Prelims 2025, Question 63
    Consider the following statements:
    Statement I: Of the two major ethanol producers in the world, i.e., Brazil and the United States of America, the former produces more ethanol than the latter.
    Statement II: Unlike in the United States of America where corn is the principal feedstock for ethanol production, sugarcane is the principal feedstock for ethanol production in Brazil.
    Which one of the following is correct in respect of the above statements?
    1. Both Statement I and Statement II are correct and Statement II explains Statement I
    2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
    3. Statement I is correct but Statement II is not correct
    4. Statement I is not correct but Statement II is correct
30. UPSC Prelims 2025, Question 70
    Consider the following statements about ‘PM Surya Ghar Muft Bijli Yojana’:
    I. It targets installation of one crore solar rooftop panels in the residential sector.
    II. The Ministry of New and Renewable Energy aims to impart training on installation, operation, maintenance and repairs of solar rooftop systems at grassroot levels.
    III. It aims to create more than three lakhs skilled manpower through fresh skilling, and up-skilling, under scheme component of capacity building.
    Which of the statements given above are correct?
    1. I and II only
    2. I and III only
    3. II and III only
    4. I, II and III
31. UPSC Prelims 2025, Question 81
    Consider the following statements:
    Statement I: Some rare earth elements are used in the manufacture of flat television screens and computer monitors.
    Statement II: Some rare earth elements have phosphorescent properties.
    Which one of the following is correct in respect of the above statements?
    1. Both Statement I and Statement II are correct and Statement II explains Statement I
    2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
    3. Statement I is correct but Statement II is not correct
    4. Statement I is not correct but Statement II is correct
32. UPSC Prelims 2025, Question 82
    Consider the following statements:
    I. Indian Railways have prepared a National Rail Plan (NRP) to create a ‘future ready’ railway system by 2028.
    II. ‘Kavach’ is an Automatic Train Protection system developed in collaboration with Germany.
    III. ‘Kavach’ system consists of RFID tags fitted on track in station section.
    Which of the statements given above are not correct?
    1. I and II only
    2. II and III only
    3. I and III only
    4. I, II and III
33. UPSC Prelims 2025, Question 83
    Consider the following space missions:
    I. Axiom-4
    II. SpaDeX
    III. Gaganyaan
    How many of the space missions given above encourage and support microgravity research?
    1. Only one
    2. Only two
    3. All the three
    4. None
34. UPSC Prelims 2025, Question 84
    With reference to India’s defence, consider the following pairs:

    	Aircraft type	Description
    I.	Dornier-228	Maritime patrol aircraft
    II.	IL-76	Supersonic combat aircraft
    III.	C-17 Globemaster III	Military transport aircraft

    How many of the pairs given above are correctly matched?
    1. Only one
    2. Only two
    3. All the three
    4. None
35. UPSC Prelims 2025, Question 85
    Artificial way of causing rainfall to reduce air pollution makes use of
    1. silver iodide and potassium iodide
    2. silver nitrate and potassium iodide
    3. silver iodide and potassium nitrate
    4. silver nitrate and potassium chloride
36. UPSC Prelims 2025, Question 94
    GPS-Aided Geo Augmented Navigation (GAGAN) uses a system of ground stations to provide necessary augmentation. Which of the following statements is/are correct in respect of GAGAN?
    I. It is designed to provide additional accuracy and integrity.
    II. It will allow more uniform and high quality air traffic management.
    III. It will provide benefits only in aviation but not in other modes of transportation.
    Select the correct answer using the code given below.
    1. I, II and III
    2. II and III only
    3. I only
    4. I and II only
37. UPSC Prelims 2025, Question 95
    Consider the following statements regarding AI Action Summit held in Grand Palais, Paris in February 2025:
    I. Co-chaired with India, the event builds on the advances made at the Bletchley Park Summit held in 2023 and the Seoul Summit held in 2024.
    II. Along with other countries, US and UK also signed the declaration on inclusive and sustainable AI.
    Which of the statements given above is/are correct?
    1. I only
    2. II only
    3. Both I and II
    4. Neither I nor II
38. UPSC Prelims 2024, Question 27
    Consider the following:
    1. Battery storage
    2. Biomass generators
    3. Fuel cells
    4. Rooftop solar photovoltaic units
    How many of the above are considered “Distributed Energy Resources”?
    1. Only one
    2. Only two
    3. Only three
    4. All four
39. UPSC Prelims 2024, Question 31
    With reference to radioisotope thermoelectric generators (RTGs), consider the following statements:
    1. RTGs are miniature fission reactors.
    2. RTGs are used for powering the onboard systems of spacecrafts.
    3. RTGs can use Plutonium-238, which is a by-product of weapons development.
    Which of the statements given above are correct?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
40. UPSC Prelims 2024, Question 32
    Consider the following statements:
    Statement-I: Giant stars live much longer than dwarf stars.
    Statement-II: Compared to dwarf stars, giant stars have a greater rate of nuclear reactions.
    Which one of the following is correct in respect of the above statements?
    1. Both Statement-I and Statement-II are correct and Statement-II explains Statement-I
    2. Both Statement-I and Statement-II are correct, but Statement-II does not explain Statement-I
    3. Statement-I is correct, but Statement-II is incorrect
    4. Statement-I is incorrect, but Statement-II is correct
41. UPSC Prelims 2024, Question 33
    Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow?
    1. Nitric oxide
    2. Nitrous oxide
    3. Nitrogen dioxide
    4. Nitrogen pentoxide
42. UPSC Prelims 2024, Question 34
    Consider the following activities:
    1. Identification of narcotics on passengers at airports or in aircraft
    2. Monitoring of precipitation
    3. Tracking the migration of animals
    In how many of the above activities can the radars be used?
    1. Only one
    2. Only two
    3. All three
    4. None
43. UPSC Prelims 2024, Question 35
    Consider the following aircraft:
    1. Rafael
    2. MiG-29
    3. Tejas MK-1
    How many of the above are considered fifth generation fighter aircraft?
    1. Only one
    2. Only two
    3. All three
    4. None
44. UPSC Prelims 2024, Question 36
    In which of the following are hydrogels used?
    1. Controlled drug delivery in patients
    2. Mobile air-conditioning systems
    3. Preparation of industrial lubricants
    Select the correct answer using the code given below:
    1. 1 only
    2. 1 and 2 only
    3. 2 and 3 only
    4. 1, 2 and 3
45. UPSC Prelims 2024, Question 37
    Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen?
    1. Hydrogen peroxide
    2. Hydronium
    3. Oxygen
    4. Water vapour
46. UPSC Prelims 2024, Question 38
    Recently, the term “pumped-storage hydropower” is actually and appropriately discussed in the context of which one of the following?
    1. Irrigation of terraced crop fields
    2. Lift irrigation of cereal crops
    3. Long duration energy storage
    4. Rainwater harvesting system
47. UPSC Prelims 2024, Question 46
    Consider the following materials:
    1. Agricultural residues
    2. Corn grain
    3. Wastewater treatment sludge
    4. Wood mill waste
    Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?
    1. 1 and 2 only
    2. 3 and 4 only
    3. 1, 2, 3 and 4
    4. 1, 3 and 4 only
48. UPSC Prelims 2024, Question 48
    Which one of the following words/phrases is most appropriately used to denote “an interoperable network of 3D virtual worlds that can be accessed simultaneously by millions of users, who can exert property rights over virtual items”?
    1. Big data analytics
    2. Cryptography
    3. Metaverse
    4. Virtual matrix
49. UPSC Prelims 2024, Question 69
    Which of the following is/are correctly matched in terms of equivalent rank in the three services of Indian Defence forces?

    	Army	Airforce	Navy
    1.	Brigadier	Air Commodore	Commander
    2.	Major General	Air Vice Marshal	Vice Admiral
    3.	Major	Squadron Leader	Lieutenant Commander
    4.	Lieutenant Colonel	Group Captain	Captain

    Select the correct answer using the code given below:
    1. 1 and 4
    2. 1 and 3
    3. 2, 3 and 4
    4. 3 only
50. UPSC Prelims 2024, Question 77
    What are the duties of the Chief of Defence Staff (CDS) as Head of the Department of Military Affairs?
    1. Permanent Chairman of Chiefs of Staff Committee
    2. Exercise military command over the three Service Chiefs
    3. Principal Military Advisor to Defence Minister on all tri-service matters
    Select the correct answer using the code given below:
    1. 1, 2 and 3
    2. 1 and 2 only
    3. 2 and 3 only
    4. 1 and 3 only
51. UPSC Prelims 2024, Question 78
    Operations undertaken by the Army towards upliftment of the local population in remote areas to include addressing of their basic needs is called:
    1. Operation Sankalp
    2. Operation Maitri
    3. Operation Sadbhavana
    4. Operation Madad
52. UPSC Prelims 2023, Question 11
    Consider the following statements:
    Statement-I: India, despite having uranium deposits, depends on coal for most of its electricity production.
    Statement-II: Uranium, enriched to the extent of at least 60%, is required for the production of electricity.
    Which one of the following is correct in respect of the above statements?
    1. Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I
    2. Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I
    3. Statement-I is correct but Statement-II is incorrect
    4. Statement-I is incorrect but Statement-II is correct
53. UPSC Prelims 2023, Question 53
    Consider the following statements:
    1. Carbon fibres are used in the manufacture of components used in automobiles and aircrafts.
    2. Carbon fibres once used cannot be recycled.
    Which of the statements given above is/are correct?
    1. 1 only
    2. 2 only
    3. Both 1 and 2
    4. Neither 1 nor 2
54. UPSC Prelims 2023, Question 54
    Consider the following actions:
    1. Detection of car crash/collision which results in the deployment of airbags almost instantaneously
    2. Detection of accidental free fall of a laptop towards the ground which results in the immediate turning off of the hard drive
    3. Detection of the tilt of the smartphone which results in the rotation of display between portrait and landscape mode
    In how many of the above actions is the function of accelerometer required?
    1. Only one
    2. Only two
    3. All three
    4. None
55. UPSC Prelims 2023, Question 55
    With reference to the role of biofilters in Recirculating Aquaculture System, consider the following statements:
    1. Biofilters provide waste treatment by removing uneaten fish feed.
    2. Biofilters convert ammonia present in fish waste to nitrate.
    3. Biofilters increase phosphorus as nutrient for fish in water.
    How many of the statements given above are correct?
    1. Only one
    2. Only two
    3. All three
    4. None
56. UPSC Prelims 2023, Question 56
    Consider the following pairs:
    (Objects in space : Description)
    1. Cepheids : Giant clouds of dust and gas in space
    2. Nebulae : Stars which brighten and dim periodically
    3. Pulsars : Neutron stars that are formed when massive stars run out of fuel and collapse
    How many of the above pairs are correctly matched?
    1. Only one
    2. Only two
    3. All three
    4. None
57. UPSC Prelims 2023, Question 57
    Which one of the following countries has its own Satellite Navigation System?
    1. Australia
    2. Canada
    3. Israel
    4. Japan
58. UPSC Prelims 2023, Question 58
    Consider the following statements:
    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.
    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.
    Which of the statements given above is/are correct?
    1. 1 only
    2. 2 only
    3. Both 1 and 2
    4. Neither 1 nor 2
59. UPSC Prelims 2023, Question 60
    With reference to green hydrogen, consider the following statements:
    1. It can be used directly as a fuel for internal combustion.
    2. It can be blended with natural gas and used as fuel for heat or power generation.
    3. It can be used in the hydrogen fuel cell to run vehicles.
    How many of the above statements are correct?
    1. Only one
    2. Only two
    3. All three
    4. None
60. UPSC Prelims 2023, Question 66
    With reference to coal-based thermal power plants in India, consider the following statements:
    1. None of them uses seawater.
    2. None of them is set up in water-stressed district.
    3. None of them is privately owned.
    How many of the above statements are correct?
    1. Only one
    2. Only two
    3. All three
    4. None
61. UPSC Prelims 2023, Question 67
    ‘Wolbachia method’ is sometimes talked about with reference to which one of the following?
    1. Controlling the viral diseases spread by mosquitoes
    2. Converting crop residues into packing material
    3. Producing biodegradable plastics
    4. Producing biochar from thermo-chemical conversion of biomass
62. UPSC Prelims 2023, Question 69
    ‘Aerial metagenomics’ best refers to which one of the following situations?
    1. Collecting DNA samples from air in a habitat at one go
    2. Understanding the genetic makeup of avian species of a habitat
    3. Using air-borne devices to collect blood samples from moving animals
    4. Sending drones to inaccessible areas to collect plant and animal samples from land surfaces and water bodies
63. UPSC Prelims 2023, Question 70
    ‘Microsatellite DNA’ is used in the case of which one of the following?
    1. Studying the evolutionary relationships among various species of fauna
    2. Stimulating ‘stem cells’ to transform into diverse functional tissues
    3. Promoting clonal propagation of horticultural plants
    4. Assessing the efficacy of drugs by conducting series of drug trials in a population
64. UPSC Prelims 2023, Question 75
    Consider the following statements:
    Statement-I: India’s public sector health care system largely focuses on curative care with limited preventive, promotive and rehabilitative care.
    Statement-II: Under India’s decentralized approach to health care delivery, the States are primarily responsible for organizing health services.
    Which one of the following is correct in respect of the above statements?
    1. Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I
    2. Both Statement-I and Statement-II are correct and Statement-II is not the correct explanation for Statement-I
    3. Statement-I is correct but Statement-II is incorrect
    4. Statement-I is incorrect but Statement-II is correct
65. UPSC Prelims 2023, Question 99
    Consider the following heavy industries:
    1. Fertilizer plants
    2. Oil refineries
    3. Steel plants
    Green hydrogen is expected to play a significant role in decarbonizing how many of the above industries?
    1. Only one
    2. Only two
    3. All three
    4. None
66. UPSC Prelims 2022, Question 31
    Consider the following:
    1. Aarogya Setu
    2. CoWIN
    3. DigiLocker
    4. DIKSHA
    Which of the above are built on top of open-source digital platforms?
    1. 1 and 2 only
    2. 2, 3 and 4 only
    3. 1, 3 and 4 only
    4. 1, 2, 3 and 4
67. UPSC Prelims 2022, Question 32
    With reference to Web 3.0, consider the following statements:
    1. Web 3.0 technology enables people to control their own data.
    2. In Web 3.0 world, there can be blockchain based social networks.
    3. Web 3.0 is operated by users collectively rather than a corporation.
    Which of the statements given above are correct?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
68. UPSC Prelims 2022, Question 33
    With reference to “Software as a Service (SaaS)”, consider the following statements:
    1. SaaS buyers can customise the user interface and can change data fields.
    2. SaaS users can access their data through their mobile devices.
    3. Outlook, Hotmail and Yahoo! Mail are forms of SaaS.
    Which of the statements given above are correct?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
69. UPSC Prelims 2022, Question 34
    Which one of the following statements best reflects the idea behind the “Fractional Orbital Bombardment System” often talked about in media?
    1. A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.
    2. A spacecraft lands on another planet after making several orbital motions.
    3. A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.
    4. A spacecraft moves along a comet with the same speed and places a probe on its surface.
70. UPSC Prelims 2022, Question 35
    Which one of the following is the context in which the term “qubit” is mentioned?
    1. Cloud Services
    2. Quantum Computing
    3. Visible Light Communication Technologies
    4. Wireless Communication Technologies
71. UPSC Prelims 2022, Question 36
    Consider the following communication technologies:
    1. Closed-circuit Television
    2. Radio Frequency Identification
    3. Wireless Local Area Network
    Which of the above are considered Short-Range devices/technologies?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
72. UPSC Prelims 2022, Question 37
    Consider the following statements:
    1. Biofilms can form on medical implants within human tissues.
    2. Biofilms can form on food and food processing surfaces.
    3. Biofilms can exhibit antibiotic resistance.
    Which of the statements given above are correct?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
73. UPSC Prelims 2022, Question 38
    Consider the following statements in respect of probiotics:
    1. Probiotics are made of both bacteria and yeast.
    2. The organisms in probiotics are found in foods we ingest but they do not naturally occur in our gut.
    3. Probiotics help in the digestion of milk sugars.
    Which of the statements given above is/are correct?
    1. 1 only
    2. 2 only
    3. 1 and 3
    4. 2 and 3
74. UPSC Prelims 2022, Question 39
    In the context of vaccines manufactured to prevent COVID-19 pandemic, consider the following statements:
    1. The Serum Institute of India produced COVID-19 vaccine named Covishield using mRNA platform.
    2. Sputnik V vaccine is manufactured using vector based platform.
    3. COVAXIN is an inactivated pathogen based vaccine.
    Which of the statements given above are correct?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
75. UPSC Prelims 2022, Question 40
    If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on the Earth?
    1. GPS and navigation systems could fail.
    2. Tsunamis could occur at equatorial regions.
    3. Power grids could be damaged.
    4. Intense auroras could occur over much of the Earth.
    5. Forest fires could take place over much of the planet.
    6. Orbits of the satellites could be disturbed.
    7. Shortwave radio communication of the aircraft flying over polar regions could be interrupted.
    Select the correct answer using the code given below:
    1. 1, 2, 4 and 5 only
    2. 2, 3, 5, 6 and 7 only
    3. 1, 3, 4, 6 and 7 only
    4. 1, 2, 3, 4, 5, 6 and 7
76. UPSC Prelims 2022, Question 46
    With reference to polyethylene terephthalate, the use of which is so widespread in our daily lives, consider the following statements:
    1. Its fibres can be blended with wool and cotton fibres to reinforce their properties.
    2. Containers made of it can be used to store any alcoholic beverage.
    3. Bottles made of it can be recycled into other products.
    4. Articles made of it can be easily disposed of by incineration without causing greenhouse gas emissions.
    Which of the statements given above are correct?
    1. 1 and 3
    2. 2 and 4
    3. 1 and 4
    4. 2 and 3
77. UPSC Prelims 2022, Question 69
    With reference to Non-Fungible Tokens (NFTs), consider the following statements:
    1. They enable the digital representation of physical assets.
    2. They are unique cryptographic tokens that exist on a blockchain.
    3. They can be traded or exchanged at equivalency and therefore can be used as a medium of commercial transactions.
    Which of the statements given above are correct?
    1. 1 and 2 only
    2. 2 and 3 only
    3. 1 and 3 only
    4. 1, 2 and 3
78. UPSC Prelims 2022, Question 84
    Consider the following statements:
    1. Gujarat has the largest solar park in India.
    2. Kerala has a fully solar powered International Airport.
    3. Goa has the largest floating solar photovoltaic project in India.
    Which of the statements given above is/are correct?
    1. 1 and 2
    2. 2 only
    3. 1 and 3
    4. 3 only
79. UPSC Prelims 2022, Question 97
    Which one of the following statements best describes the role of B cells and T cells in the human body?
    1. They protect the body from environmental allergens.
    2. They alleviate the body’s pain and inflammation.
    3. They act as immunosuppressants in the body.
    4. They protect the body from the diseases caused by pathogens.
80. UPSC Prelims 2022, Question 98
    Consider the following statements:
    1. Other than those made by humans, nanoparticles do not exist in nature.
    2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.
    3. Nanoparticles of some commercial products which enter the environment are unsafe for humans.
    Which of the statements given above is/are correct?
    1. 1 only
    2. 3 only
    3. 1 and 2
    4. 2 and 3
81. UPSC Prelims 2022, Question 99
    Consider the following statements:
    DNA Barcoding can be a tool to:
    1. assess the age of a plant or animal.
    2. distinguish among species that look alike.
    3. identify undesirable animal or plant materials in processed foods.
    Which of the statements given above is/are correct?
    1. 1 only
    2. 3 only
    3. 1 and 2
    4. 2 and 3

Take the timed test above to see the answers and explanations.