2025 Prelims Paper 1 UPSC Question Paper

UPSC Prelims Paper 1 Question Papers

2025 Prelims Paper 1 UPSC Questions

1.
Consider the following types of vehicles:
1. Full battery electric vehicles
2. Hydrogen fuel cell vehicles
3. Fuel cell-electric hybrid vehicles
How many of the above are considered as alternative powertrain vehicles?
A.
Only one
B.
Only two
C.
All the three
D.
None
😑 View Answer Rough Work
ANSWER :
C. All the three
2.
With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements:
1. All types of UAVs can do vertical landing.
2. All types of UAVs can do automated hovering.
3. All types of UAVs can use battery only as a source of power supply.
How many of the statements given above are correct?
A.
Only one
B.
Only two
C.
All the three
D.
None
😑 View Answer Rough Work
ANSWER :
D. None
3.
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?
A.
Only one
B.
Only two
C.
Only three
D.
All the four
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ANSWER :
C. Only three
4.
Consider the following:
I. Cigarette butts
II. Eyeglass lenses
III. Car tyres
How many of them contain plastic?
A.
Only one
B.
Only two
C.
All the three
D.
None
😑 View Answer Rough Work
ANSWER :
C. All the three
5.
Consider the following substances:
I. Ethanol
II. Nitroglycerine
III. Urea
Coal gasification technology can be used in the production of how many of them?
A.
Only one
B.
Only two
C.
All the three
D.
None
😑 View Answer Rough Work
ANSWER :
B. Only two
6.
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?
A.
These are alternatives to hydrofluorocarbon refrigerants
B.
These are explosives in military weapons
C.
These are high-energy fuels for cruise missiles
D.
These are fuels for rocket propulsion
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ANSWER :
B. These are explosives in military weapons
7.
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?
A.
I and II only
B.
II and III only
C.
I and III only
D.
I, II and III
😑 View Answer Rough Work
ANSWER :
C. I and III only
8.
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?
A.
I and II only
B.
II and III only
C.
I and III only
D.
I, II and III
😑 View Answer Rough Work
ANSWER :
D. I, II and III
9.
Consider the following statements:
I. No virus can survive in ocean water.
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?
A.
Only one
B.
Only two
C.
All the three
D.
None
😑 View Answer Rough Work
ANSWER :
D. None
10.
Consider the following statements:
Statement I: Activated carbon is a good and an attractive tool to remove pollutants from effluent streams and to remediate contaminants from various industries.
Statement II: Activated carbon exhibits a large surface area and a strong potential for adsorbing heavy metals.
Statement III: Activated carbon can be easily synthesized from environmental wastes with high carbon content.
Which one of the following is correct in respect of the above statements?
A.
Both Statement II and Statement III are correct and both of them explain Statement I
B.
Both Statement II and Statement III are correct but only one of them explains Statement I
C.
Only one of the Statements II and III is correct and that explains Statement I
D.
Neither Statement II nor Statement III is correct
😑 View Answer Rough Work
ANSWER :
A. Both Statement II and Statement III are correct and both of them explain Statement I