UKPSC General Science and Technology — Previous Year Questions

This page has 43 solved questions on General Science and Technology across 2 papers (2024–2025). Every one is solved below — open a question for the answer, why it is right, and why each wrong option was written to tempt you.

Which questions belong on this page was decided by an automated classification pass, not reviewed by UnlockIAS faculty.

1. 2025Q7What is the Boolean expression for a NAND gate?Answer: B
2. 2025Q8Which of the following is used to measure the speed of a computer’s processor?Answer: C
3. 2025Q9Which application software is used for sending and receiving e-mails?Answer: B
4. 2025Q10What does the acronym PaaS stand for in cloud computing?Answer: A
5. 2025Q11Bulk Modulus for a perfectly rigid body is:Answer: A
6. 2025Q13Where is the Herbal Research and Development Institute of Uttarakhand situated?Answer: B
7. 2025Q15The moderator used in a nuclear reactor is:Answer: B
8. 2025Q16The marble of Taj Mahal is getting discoloured and lustreless due to:Answer: A
9. 2025Q17The thickness of the ozone layer from the base to the top of the atmosphere is measured in:Answer: A
10. 2025Q18The rate at which solar energy is stored in green plants to be used as food is called:Answer: A
11. 2025Q19The interaction in which one organism is benefitted and the other is neither harmed nor benefitted is called:Answer: B
12. 2025Q20Consider the following statements about Nanda Devi Biosphere Reserve: 1. It is a World Heritage Site. 2. Its inhabitants include snow leopard, musk deer and blue sheep. Choose the correct answer using the options below:Answer: C
13. 2025Q21Match the items given in Column-I and Column-II: Column-I A. Biomagnification B. Electro-precipitation C. Landfills D. Stratosphere Column-II 1. Synthesis of ozone 2. Solid waste 3. Concentration build-up at successive trophic levels 4. Particulate matter Codes:Answer: A
14. 2025Q22Consider the following statements: Statement I: Light travels faster in air than in water. Statement II: Refractive index of air is greater than that of water. Select the correct option:Answer: A
15. 2025Q23Consider the following statements: 1. The coefficient of linear expansion has dimension K⁻¹. 2. The coefficient of volume expansion has dimension K⁻¹. Choose the correct option:Answer: A
16. 2025Q24When milk is converted into curd, the sour taste is due to:Answer: C
17. 2025Q25Penicillin was discovered by:Answer: C
18. 2025Q26Correct hierarchy of classification of plants is:Answer: A
19. 2025Q33Which of the following statements about causes of biodiversity loss is/are correct? 1. Habitat loss and fragmentation are the most important cause driving animals and plants to extinction. 2. Human activities lead to over-exploitation of natural resources. 3. When a species becomes extinct, the plant and animal species associated with it do not become extinct. Choose the correct answer using the options below:Answer: C
20. 2025Q34Transformation of normal cells into cancerous neoplastic cells may be induced by physical, chemical or biological agents are called:Answer: A
21. 2025Q35Which pair is NOT correctly matched?Answer: C
22. 2025Q39What is the objective of the ‘DigiLocker’ service?Answer: A
23. 2025Q41Which of the following technologies is used to create personalised medicine based on a patient’s genetic make-up?Answer: A
24. 2025Q52Which of the following UNESCO World Heritage Sites is/are located in Uttarakhand? Choose the correct option: A. Valley of Flowers B. Kaziranga National Park C. Mountain Railways of India D. Nanda Devi National ParkAnswer: D
25. 2025Q97The word ‘Biodiversity’ was coined by:Answer: A
26. 2025Q105Consider the following statements and select the correct answer from the options given below: Statement 1: Uttarakhand is highly vulnerable to climate change. Statement 2: Climate change is causing water stress and depleting biodiversity in Uttarakhand.Answer: C
27. 2025Q106Consider the following statements and select the correct answer from the options given below: Statement 1: The State Council for Climate Change (SCCC) of Uttarakhand was established in the year 2011. Statement 2: The responsibility of preparing the Uttarakhand Action Plan on Climate Change (UAPCC) was given to the State Revenue Department.Answer: A
28. 2024Q68The term GHz is the indicator of which feature of the computer?Answer: C
29. 2024Q69Which of the following is the 5th generation AI programming language?Answer: D
30. 2024Q70Which modulation technique is preferred for medium-speed communication range up to 1200 to 2400 bits per second?Answer: B
31. 2024Q71Consider a tightly wound 100-turn coil of radius 10 cm, carrying a current of 1 A. What will be the magnitude of the magnetic field at the centre of the coil?Answer: A
32. 2024Q73What will be the de Broglie wavelength of a ball of mass 0.12 kg moving with a speed of 20 m s⁻¹?Answer: D
33. 2024Q74Food cans are coated with Tin instead of Zinc, becauseAnswer: C
34. 2024Q76Which one of the following is the highest reactive metal?Answer: B
35. 2024Q77The geographical regions that are particularly rich in endemic, rare and threatened species, found relatively in small areas and facing significant habitat loss, are referred to as:Answer: C
36. 2024Q78Organisms which grow best in the temperature range of 0-15 °C are referred to as:Answer: B
37. 2024Q80Which of the following helps some hydrophytes to thrive in wetlands and marshes where the water level fluctuates from time to time?Answer: C
38. 2024Q81The relative contribution of different greenhouse gases to global warming is given below. Identify the incorrect pair.Answer: C
39. 2024Q82The term antibiotic was coined byAnswer: D
40. 2024Q83Which of the following is the first human hormone produced by recombinant DNA technology?Answer: C
41. 2024Q84The hybridoma technique was developed by whom?Answer: B
42. 2024Q85Which of the following is used as an immunosuppressor for kidney transplantation?Answer: D
43. 2024Q89The half-life of a radioactive substance is 4 months. How much time will it take to decay 3/4th of the substance?Answer: B