2025 Prelims PYQs 1] Consider the following statements: [2025/A-49] I. No virus can survive in ocean waters.II. No virus can infect bacteria.III. No virus can…
2025 Prelims PYQs 1] Consider the following substances: [2025/A-45] I. EthanolII. NitroglycerineIII. UreaCoal gasification technology can be used in the production of how many of…
2024 Prelims PYQs 1] With reference to radioisotope thermoelectric generators (RTGs), consider the following statements: [2024] 1. RTGs are miniature fission reactors.2. RTGs are used…
UPSC CSE Prelims – Science and Tech – Biotechnology Previous Year Questions from 1995 – Present
2025 Prelims PYQs 1] With reference to Unmanned Aerial Vehicles (UAVs), consider the following statements: [2025/A-42] I. All types of UAVs can do vertical landing.II.…
2025 Prelims PYQs 1] In the context of electric vehicle batteries, consider the following elements: [2025/A-43] I. CobaltII. GraphiteIII. LithiumIV. NickelHow many of the above…
2025 Prelims PYQs 1] Consider the following statements regarding AI Action Summit held in Grand Palais, Paris in February 2025: [2025/A-95] I. Co-chaired with India,…
2025 Prelims PYQs 1] Consider the following countries: [2025/A-21] I. AustriaII. BulgariaIII. CroatiaIV. SerbiaV. SwedenVI. North MacedoniaHow many of the above are members of the…
2020 Prelims PYQs 1] In India, why are some nuclear reactors kept under “IAEA safeguards” while others are not? [2020]a) Some use uranium and others…
2025 Prelims PYQs 1] What is the common characteristic of the chemical substances generally known as CL-20, HMX and LLM-105, which are sometimes talked about…