UPSC Prelims PYQ

UPSC Prelims Science and technology Questions

108 Science and technology questions from previous UPSC Prelims papers, from the latest year backwards, each with its answer and explanation.

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Questions: 108
Years covered: 2016–2026
Exam years: 9
With answers: 108

Science and technology questions by year

2026 🔒17 202515 20249 2023 🔒12 2022 🔒11 2019 🔒13 2018 🔒11 2017 🔒11 2016 🔒9

UPSC Prelims Science and technology Questions

21–24 of 24

Q21 2024 Prelims GS

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
Biomedical and industrial applicationsHydrogelsMaterials science
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Q22 2024 Prelims GS

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
Clean energyFuel-cell vehicle emissionsHydrogen fuel cells
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Q23 2024 Prelims GS

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
Energy storageGrid-scale electricity balancingPumped-storage hydropower
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Q24 2024 Prelims GS

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
Digital technologiesMetaverseScience and technology
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