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UPSC Science & Technology PYQs 2025 | Vaidra | Vaidra
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Science & Technology UPSC PYQ 2025

22 questions from the UPSC 2025 examination.

22 questions

1Mediumprelims2 marks
Space Technology & Astronomy

Consider the following space missions : I. Axiom-4 II. SpaDeX III. Gaganyaan How many of the space missions given above encourage and support micro-gravity research?

AOnly one
BOnly two
CAll the three
DNone
2Medium2 marks

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?

AOnly one
BNone
CAll the three
DOnly two
3Medium2 marks

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?

AI and II only
BII and III only
CI and III only
DI, II and III
4Medium1 mark

Consider the following statements:[2025] 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 I
BBoth Statement I and Statement II are correct but Statement II does not explain Statement I
CStatement I is correct but Statement II is not correct
DStatement I is not correct but Statement II is correct
5Medium2 marks

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?

AOnly one
BOnly two
COnly three
DAll the four
6Medium1 mark

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?[2025] 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 III
BII and III only
CI only
DI and II only
7Mediumprelims2 marks
Science and Technology

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

Asilver iodide and potassium iodide
Bsilver nitrate and potassium iodide
Csilver iodide and potassium nitrate
Dsilver nitrate and potassium chloride
8Medium2 marks

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 only
BII and III only
CI and III only
DI, II and III
9Mediumprelims2 marks
Space Technology & Astronomy

Consider the following statements in respect of the ICC World Test Championship:

AThe finalists were decided by the number of matches they won
BNew Zealand was ranked ahead of England because it won more matches than England
CBoth 1 and 2
DNeither 1 nor 2
10Mediumprelims2 marks
Computer & Information Technology

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 I
BBoth Statement I and Statement II are correct but Statement II does not explain Statement I
CStatement I is correct but Statement II is not correct
DStatement I is not correct but Statement II is correct
11Medium2 marks

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?

AAll the three
BOnly two
COnly one
DNone
12Medium1 mark

With reference to monoclonal antibodies, often mentioned in news, consider the following statements:[2025] 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 only
BII and III only
CI and III only
DI, II and III
13Mediumprelims2 marks
Health & Diseases

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 one
BOnly two
CAll the three
DNone
14Medium1 mark

Consider the following pace missions :[2025] I. Axiom-4 II. SpaDeX III. Gaganyaan How many of the space missions given above encourage and support micro-gravity research?

AOnly one
BOnly two
CAll the three
DNone
15Medium1 mark

With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:[2025] 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?[2025]

AOnly one
BOnly two
CAll the three
DNone
16Medium2 marks

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 III
BII and III only
CI only
DI and II only
17Medium2 marks

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. Which of the statements given above is/are correct?

AOnly one
BOnly two
CAll the three
DNone
18Medium1 mark

Consider the following statements:[2025] 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 one
BOnly two
CAll the three
DNone
19Medium1 mark

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?[2025]

AThese are alternatives to hydro-fluorocarbon refrigerants
BThese are explosives in military weapons
CThese are high-energy fuels for cruise missiles
DThese are fuels for rocket propulsion
20Medium2 marks

Consider the following substances: I. Ethanol II. Nitroglycerine III. Urea Coal gasification technology can be used in the production of how many of them?

AOnly one
BOnly two
CAll the three
DNone
21Medium1 mark

Consider the following substances:[2025] I. Ethanol II. Nitroglycerine III. Urea Coal gasification technology can be used in the production of how many of them?

AOnly one
BOnly two
CAll the three
DNone
22Mediumprelims2 marks
Computer & Information Technology

With reference to 'Direct Air Capture', an emerging technology, which of the following statements is/are correct? I. It can be used as a way of carbon sequestration. II. It can be a valuable approach for plastic production and in food processing. III. In aviation, it can be a source of carbon for combining with hydrogen to create synthetic low-carbon fuel. Select the correct answer using the code given below.

AI and II only
BIII only
CI, II and III
DNone of the above statements is correct
Science & Technology — All Years|All Subjects