IAS Science PYQ
Topic-wise IAS Science previous year questions with detailed solutions.
491 Questions
4 Topics
1996–2026
Year-wise weightage
How many Science questions each topic contributed per year in IAS — darker cells mean more questions that year. Tap a topic to open its questions.
| Topic | Weightage | Total | 2026 | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Technology | 35.6% | 175 | 6 | 10 | 9 | 8 | 11 | 3 | 12 | 13 | 9 | 2 | 2 | 6 | 7 | 5 | 6 | 10 | 7 | 1 | 4 | 2 | 2 | 5 | 3 | 3 | 2 | 6 | 2 | 5 | 5 | 5 | 4 |
| Biology | 28.5% | 140 | 1 | 1 | 1 | 4 | 4 | 2 | 2 | 1 | 1 | 1 | 6 | 5 | 3 | 4 | 3 | 1 | 6 | 9 | 8 | 2 | 5 | 6 | 12 | 9 | 12 | 4 | 7 | 9 | 11 | ||
| Physics | 20.0% | 98 | 1 | 2 | 2 | 2 | 3 | 4 | 2 | 2 | 1 | 1 | 3 | 7 | 4 | 3 | 4 | 5 | 5 | 11 | 10 | 10 | 2 | 6 | 8 | ||||||||
| Chemistry | 15.9% | 78 | 4 | 1 | 1 | 3 | 1 | 1 | 1 | 1 | 1 | 2 | 5 | 4 | 3 | 2 | 3 | 6 | 3 | 4 | 9 | 4 | 9 | 6 | 4 | ||||||||
| All topics | 491 | 8 | 15 | 12 | 15 | 18 | 11 | 14 | 15 | 10 | 3 | 3 | 6 | 14 | 14 | 12 | 17 | 11 | 5 | 18 | 22 | 17 | 12 | 15 | 20 | 22 | 30 | 33 | 23 | 23 | 26 | 27 |
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Science Topics
IAS Science questions
A cross-section of Science questions asked in IAS, spread across topics and years. Open any one for the full solution.
- Which of the following statements with regard to drone swarms is/are correct? 1. They use Terahertz band of…2026
- Which of the following statements with regard to stealth technology is/are correct? 1. Stealth objects have a…2026
- Which of the following statements with regard to genetic medicine is/are correct? 1. Genetic medicines…2026
- Consider the following: 1. Cigarette butts 2. Eyeglass lenses 3. Car tyres How many of them contain plastic?2025
- Which of the following statements with regard to Large Language Models (LLMs) used in machine learning is/are…2026
- Consider the following activities : 1. Identification of narcotics on passengers at airports or in aircraft…2024
- Consider the following statements : 1. No virus can survive in ocean waters. 2. No virus can infect bacteria.…2025
- Consider the following statements : 1. Statement I : Some rare earth elements are used in the manufacture of…2025
- Consider the following statements with regard to involvement of private entities in India's space programme:…2026
- Consider the following statements : 1. Statement-I : Giant stars live much longer than dwarf stars. 2.…2024
- Which one of the following is synthesised in human body that dilates blood vessels and increases blood flow ?2024
- Consider the following statements : 1. Statement I : Activated carbon is a good and an attractive tool to…2025
- Which of the following statements regarding the features of blockchain technology are correct? 1. Records…2026
- Consider the following pairs: Objects in space | Description 1. Cepheids | Giant clouds of dust and gas in…2023
- Which of the following organisms perform waggle dance for others of their kin to indicate the direction and…2023
- What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which…2025
- Which of the following statements with regard to GenomeIndia Project is/are correct? 1. It is a part of the…2026
- Consider the following statements : 1. In a seismograph, P waves are recorded earlier than S waves. 2. In P…2023
- Consider the following statements : 1. Some mushrooms have medicinal properties. 2. Some mushrooms have…2023
- Consider the following statements : 1. Carbon fibres are used in the manufacture of components used in…2023
- Which of the following statements with regard to Black Boxes used in modern aircrafts is/are correct? 1. They…2026
- If a major solar storm (solar flare) reaches the Earth, which of the following are the possible effects on…2022
- 'Aerial metagenomics' best refers to which one of the following situations?2023
- With reference to polyethylene terephthalate, the use of which is so widespread in our daily lives, consider…2022
- In the context of electric vehicle batteries, consider the following elements : 1. Cobalt 2. Graphite 3.…2025
- Which one of the following is the context in which the term "qubit" is mentioned ?2022
- With reference to the role of biofilters in Recirculating Aquaculture System, consider the following…2023
- Triclosan', considered harmful when exposed to high levels for a long time, is most likely present in which…2021
- Consider the following substances : 1. Ethanol 2. Nitroglycerin 3. Urea Coal gasification technology can be…2025
- Which one of the following is a reason why astronomical distances are measured in light-years?2021
- Which of the following are nitrogen-fixing plants? 1. Alfalfa 2. Amaranth 3. Chickpea 4. Clover 5. Purslane…2022
- Water can dissolve more substances than any other liquid because2021
- Consider the following statements about 'PM Surya Ghar Muft Bijli Yojana' : 1. It targets installation of one…2025
- In a pressure cooker, the temperature at which the food is cooked depends mainly upon which of the following?…2021
- Consider the following statements : DNA Barcoding can be a tool to : 1. assess the age of a plant or animal.…2022
- Bisphenol A (BPA), a cause of concern, is a structural/key component in the manufacture of which of the…2021