UPPSC Prelims · Topic-wise PYQs
Science & Tech and Basic Science UPPSC Prelims PYQs
722 questions on Science & Tech and Basic Science asked in UPPSC Prelims, sorted into 8 sub-topics. In the app you practise each sub-topic as a timed test (longer sub-topics in sets of about 25 questions) with the UPPSC marking (+1.33 / −0.44 per question), followed by a full analysis.
About Science & Tech and Basic Science in UPPSC Prelims
Science & Tech and Basic Science is the largest of the 12 topics in the UPPSC bank: 722 of its 4,128 topic-wise PYQs (17.5%). The biggest sub-topics are Biology (205), Physics (196), Chemistry (127).
Sub-topics and question counts
| Sub-topic | PYQs | Latest year |
|---|---|---|
| Biology | 205 | 2025 |
| Physics | 196 | 2025 |
| Chemistry | 127 | 2025 |
| Diseases | 78 | 2024 |
| Defence, Inventions & Research Labs | 49 | 2025 |
| Space | 28 | 2025 |
| Electronics & IT | 22 | 2024 |
| Biotech | 17 | 2018 |
| Total | 722 | 2025 |
Sub-topics with fewer than 20 questions are practised inside the Science & Tech and Basic Science tests in the app and have no page of their own.
Science & Tech and Basic Science PYQs by the latest year asked
Each question is counted once, under the latest year it was asked in the exam.
| Period | PYQs | Share |
|---|---|---|
| 2021 and later | 109 | |
| 2016–2020 | 122 | |
| 2011–2015 | 119 | |
| 2001–2010 | 201 | |
| Before 2001 | 171 |
Sample Science & Tech and Basic Science questions from the free tests
Question text only. The options, the answer and the explanation open in the free test (free sign-in with your mobile number).
Asked in 2025
Consider the following elements found in a typical 70 kg man and arrange them in correct increasing order.
Attempt it in the free UPPSC 2025 GS Paper I
1. Sodium
2. Potassium
3. Copper
4. Iron
Select the correct answer from the code given below :
Code :Asked in 2025
Arrange the following electromagnetic radiations in decreasing order of their frequencies.
Attempt it in the free UPPSC 2025 GS Paper I
1. Gamma rays
2. Ultraviolet rays
3. Radio waves
4. X-rays
Select the correct answer from the code given below :
Code :Asked in 2025
Iron dome missile defence system belongs to which of the following countries ?
Attempt it in the free UPPSC 2025 GS Paper I
1. France
2. United States of America
3. Israel
Select the correct answer from the code given below :
Code :
Questions students ask
How many Science & Tech and Basic Science questions has UPPSC Prelims asked?
Sovereign IAS has 722 Science & Tech and Basic Science previous-year questions from UPPSC Prelims in 8 sub-topics, the latest from 2025.
Which Science & Tech and Basic Science sub-topics come up most often?
Biology (205 questions), Physics (196 questions), Chemistry (127 questions).
Can I practise UPPSC Science & Tech and Basic Science PYQs for free?
Partly. 23 of these 722 questions are in the free UPPSC tests (the latest papers and two topic-wise tests, free with a sign-in); the full set is part of the Destiny Pass.