Current Affairs
Ecology and Environment
Economy
Geography
History of India
Indian Polity and Governance
Science and Technology
1
UPSC Civil Service Prelims Paper I 2021 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66
Water can dissolve more substances than any other liquid because
2
UPSC Civil Service Prelims Paper I 2021 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66
With reference to street-lighting, how do sodium lamps differ from LED lamps?
1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps.
2. As street lights, sodium lamps have a longer life span than LED lamps.
3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting.
Select the correct answer using the code given below.
3
UPSC Civil Service Prelims Paper I 2021 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66
The term ‘ACE2’ is talked about in the context of
4
UPSC Civil Service Prelims Paper I 2021 (General Studies)
MCQ (Single Correct Answer)
+2
-0.66
Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the following kinds of plastics?
Paper Analysis
Total Questions
Current Affairs 4
Ecology and Environment 20
Economy 12
Geography 8
History of India 20
Indian Polity and Governance 24
Science and Technology 12
More Papers of UPSC Civil Service
UPSC Civil Service Prelims Paper II 2025 (CSAT) UPSC Civil Service Prelims Paper I 2025 (General Studies) UPSC Civil Service Prelims Paper II 2024 (CSAT) UPSC Civil Service Prelims Paper I 2024 (General Studies) UPSC Civil Service Prelims Paper II 2023 (CSAT) UPSC Civil Service Prelims Paper I 2023 (General Studies) UPSC Civil Service Prelims Paper II 2022 (CSAT) UPSC Civil Service Prelims Paper I 2022 (General Studies) UPSC Civil Service Prelims Paper II 2021 (CSAT) UPSC Civil Service Prelims Paper I 2021 (General Studies)
UPSC Civil Service Papers
All year-wise previous year question papers
2025
2024
2023
2022