UPSC Mains Science Previous Year Questions Pdf Download 2021

Hello folks, we are back again with more UPSC-related study material. Today we are sharing UPSC Mains Science Previous Year Questions Pdf Download 2021.

The previous year’s question paper lays the foundation for strengthening further preparation. We have tried arranging the paper topic wise eg. Science and Technology, History, Geography, etc.

UPSC Mains Science and tech Questions 2019

How can biotechnology help to improve the living standards of farmers?
What is India’s plan to have its own space station and how will it benefit our space program?

UPSC Mains Science and tech Questions 2018

Discuss the work of ‘Bose-Einstein Statistics were done by Prof. Satyendra Nath Bose and show how it revolutionized the field of Physics (150 words)
Why is there so much activity in the field of biotechnology in our country? How has this activity benefitted the field of biopharma? (250 words)
Why is the Indian Regional Navigational Satellite System (IRNSS) needed? How does it help in navigation? (GS-1) (150 words) 10

Science Mains Previous Year Paper Download Pdf 2017

Stem cell therapy is gaining popularity in India to treat a wide variety of medical conditions including leukaemia Thalassemia damaged cornea and several bums Describe briefly what stem cell therapy is and what advantages it has over other treatments?
India has achieved remarkable successes in unmanned space missions including the Chandrayaan and Mars Orbiter Mission, but has not ventured into manned space mission, both in terms of technology and logistics? Explain critically
Give an account of the growth and development of nuclear science and technology in India. What is the advantage of fast breeder reactor program in India? (250 words, 15 marks)

Mains Science Questions UPSC Pdf Download 2016

Give an account of the current status and the targets to be achieved pertaining to renewable energy sources in the country. Discuss in brief the importance of National Program on Light Emitting Diodes (LEDs).
Discuss India’s achievements in the field of Space Sciences and Technology. How the application of this technology has helped India in its socio-economic development?
Why is nanotechnology one of the key technologies of the 21st century? Describe the salient features of Indian Government’s Mission on Nano-science and Technology and the scope of its application in the development process of the country.

UPSC Science Mains Previous Year Questions pdf Download 2015

What do you understand by ‘Standard Positioning Systems’ and Precision Positioning Systems in the GPS era? Discuss the advantages India perceives from its ambitious IRNSS program employing just seven satellites.
What are the areas of prohibitive labor that can be sustainably managed by robots? Discuss the initiatives that can propel research in premier research institutes for substantive and gainful innovation.
Discuss the advantages and security implications of cloud hosting of servers vis-a-vis in-house machine-based hosting for government businesses
India’s Traditional Knowledge Digital Library (TKDL), which has a database containing formatted information on more than 2 million medicinal formulations is proving a powerful weapon in the country’s fight against erroneous patents Discuss the pros and cons of making this database publicly available under open-source licensing.

UPSC Mains Previous Year Science 2014

Scientific research in Indian universities is declining because a career in science is not as attractive as are business professions, engineering or administration and the universities are becoming consumer oriented, Critically comment.
Can overuse and free availability of antibiotics without Doctors prescription, be contributors to the emergence of drug-resistant diseases in India? What are the available mechanisms for monitoring and control Critically discuss the various issues involved.
In a globalized world, intellectual property rights assume significance and are a source of litigation Broadly distinguish between the terms copyrights patent and trade secrets.

Mains UPSC Science Questions Pdf Download 2013

What do you understand by Fixed Dose Drug Combinations (FDCs)? Discuss their merits and demerits
What do you understand about the Umpire Decision Review System in Cricket? Discuss its various components Explain how silicon tape on the edge of a bat may fool the system?
(a) What is a digital signature? What does its authentication mean? Give various salient built-in features of a digital signature.
(b) How does the 3D printing technology work? List out the advantages and disadvantages of the technology.
(a) What is an FRP composite material? How are they manufactured? Discuss their applications in the aviation and automobile industries
(b) Do you understand by run-of-river hydroelectricity project? How is it different from any other hydroelectricity project?
Bringing out the circumstances in 2005 which forced an amendment to section 3(d) in Indian Patent Law, 1970, discuss how it has been utilized by the Supreme Court in its judgment in rejecting Novartis patent application for Glivec. Discuss briefly the pros and cons of the decision

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If you are fresh UPSC Aspirants, we recommend you know about UPSC Prelims and UPSC Mains and also UPSC Optionals for a better understanding of the exam.