Science & Technology PYQs

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1. Prelims 2025Q48Biotechnology

   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?

   aI and II onlybII and III onlycI and III onlydI, II and III
2. Prelims 2025Q49Biology & Human Body

   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?

   aOnly onebOnly twocAll the threedNone
3. Prelims 2025Q81Chemistry

   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?

   aBoth Statement I and Statement II are correct and Statement II explains Statement IbBoth Statement I and Statement II are correct but Statement II does not explain Statement IcStatement I is correct but Statement II is not correctdStatement I is not correct but Statement II is correct
4. Prelims 2025Q83Space TechnologyAnswer disputed

   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?

   aOnly onebOnly twocAll the threedNone
5. Prelims 2025Q84Defence & Nuclear Technology

   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?

   aOnly onebOnly twocAll the threedNone
6. Prelims 2025Q85Chemistry

   Artificial way of causing rainfall to reduce air pollution makes use of

   asilver iodide and potassium iodidebsilver nitrate and potassium iodidecsilver iodide and potassium nitratedsilver nitrate and potassium chloride
7. Prelims 2025Q94Space Technology

   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.

   aI, II and IIIbII and III onlycI onlydI and II only
8. Prelims 2024Q19Biology & Human Body

   Consider the following plants :

   1.Groundnut

   2.Horse-gram

   3.Soybean

   How many of the above belong to the pea family ?

   aOnly onebOnly twocAll threedNone
9. Prelims 2024Q31Space Technology

   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 ?

   a1 and 2 onlyb2 and 3 onlyc1 and 3 onlyd1, 2 and 3
10. Prelims 2024Q32Space Technology

    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 ?

    aBoth Statement-I and Statement-II are correct and Statement-II explains Statement-IbBoth Statement-I and Statement-II are correct, but Statement-II does not explain Statement-IcStatement-I is correct, but Statement-II is incorrectdStatement-I is incorrect, but Statement-II is correct
11. Prelims 2024Q33Biology & Human Body

    Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow ?

    aNitric oxidebNitrous oxidecNitrogen dioxidedNitrogen pentoxide
12. Prelims 2024Q34Physics

    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 ?

    aOnly onebOnly twocAll threedNone
13. Prelims 2024Q35Defence & Nuclear Technology

    Consider the following aircraft :

    1.Rafael

    2.MiG-29

    3.Tejas MK-1

    How many of the above are considered fifth generation fighter aircraft ?

    aOnly onebOnly twocAll threedNone
14. Prelims 2024Q36Emerging Technologies

    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 :

    a1 onlyb1 and 2 onlyc2 and 3 onlyd1, 2 and 3
15. Prelims 2024Q37Chemistry

    Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles, powered by hydrogen ?

    aHydrogen peroxidebHydroniumcOxygendWater vapour
16. Prelims 2024Q48Emerging Technologies

    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” ?

    aBig data analyticsbCryptographycMetaversedVirtual matrix
17. Prelims 2023Q11Defence & Nuclear Technology

    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?

    aBoth Statement–I and Statement–II are correct and Statement–II is the correct explanation for Statement–IbBoth Statement–I and Statement–II are correct and Statement–II is not the correct explanation for Statement–IcStatement–I is correct but Statement–II is incorrectdStatement–I is incorrect but Statement–II is correct
18. Prelims 2023Q18Biology & Human Body

    Consider the following statements :

    1.Some microorganisms can grow in environments with temperature above the boiling point of water.

    2.Some microorganisms can grow in environments with temperature below the freezing point of water.

    3.Some microorganisms can grow in highly acidic environment with a pH below 3.

    How many of the above statements are correct?

    aOnly onebOnly twocAll threedNone
19. Prelims 2023Q53Emerging Technologies

    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?

    a1 onlyb2 onlycBoth 1 and 2dNeither 1 nor 2
20. Prelims 2023Q54Physics

    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 smart-phone 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?

    aOnly onebOnly twocAll threedNone