Science and technology play a crucial role in shaping our world, and having strong general knowledge in this field is essential for competitive exams like UPSC, SSC, Banking, Railways, NDA, CDS, and State PSCs. Understanding key concepts in physics, chemistry, biology, space science, and modern technology will not only boost your knowledge but also help you score well in exams.
In this article, we have compiled important Science and Technology GK questions with answers to help you prepare effectively. Let’s get started!
Science and Technology GK Questions and Answers
1. Physics GK Questions
Q1. What is the SI unit of force?
👉 Answer: Newton (N)
Q2. Who discovered the law of gravity?
👉 Answer: Sir Isaac Newton
Q3. What is the speed of light in a vacuum?
👉 Answer: 299,792,458 meters per second
Q4. Which scientist developed the theory of relativity?
👉 Answer: Albert Einstein
Q5. What type of energy is stored in a stretched rubber band?
👉 Answer: Potential energy
Q6. Which law states that “for every action, there is an equal and opposite reaction”?
👉 Answer: Newton’s Third Law of Motion
Q7. What is the unit of electrical resistance?
👉 Answer: Ohm (Ω)
Q8. What is the freezing point of water in Fahrenheit?
👉 Answer: 32°F
Q9. What kind of mirror is used in car rearview mirrors?
👉 Answer: Convex mirror
Q10. What is the principle behind hydraulic brakes?
👉 Answer: Pascal’s Law
2. Chemistry GK Questions
Q11. What is the chemical symbol for gold?
👉 Answer: Au
Q12. Which gas is known as “Laughing Gas”?
👉 Answer: Nitrous Oxide (N₂O)
Q13. What is the pH value of pure water?
👉 Answer: 7
Q14. Who is known as the “Father of Modern Chemistry”?
👉 Answer: Antoine Lavoisier
Q15. What is the chemical formula for table salt?
👉 Answer: NaCl (Sodium Chloride)
Q16. Which element is the most abundant in the Earth’s crust?
👉 Answer: Oxygen
Q17. What type of bond is formed between sodium and chlorine in salt?
👉 Answer: Ionic bond
Q18. What is dry ice?
👉 Answer: Solid carbon dioxide (CO₂)
Q19. Which acid is found in lemon?
👉 Answer: Citric acid
Q20. What is the hardest natural substance on Earth?
👉 Answer: Diamond
3. Biology GK Questions
Q21. What is the powerhouse of the cell?
👉 Answer: Mitochondria
Q22. Which vitamin is produced in the human body when exposed to sunlight?
👉 Answer: Vitamin D
Q23. What is the largest organ in the human body?
👉 Answer: Skin
Q24. What is the normal pH range of human blood?
👉 Answer: 7.35 – 7.45
Q25. What is the process by which green plants make their own food?
👉 Answer: Photosynthesis
Q26. What is the name of the protein that carries oxygen in the blood?
👉 Answer: Hemoglobin
Q27. Which organ in the human body produces insulin?
👉 Answer: Pancreas
Q28. What is the largest bone in the human body?
👉 Answer: Femur (Thigh Bone)
Q29. What is the smallest unit of life?
👉 Answer: Cell
Q30. How many chromosomes does a human cell have?
👉 Answer: 46 (23 pairs)
4. Space Science GK Questions
Q31. Which planet is known as the “Red Planet”?
👉 Answer: Mars
Q32. Who was the first person to walk on the Moon?
👉 Answer: Neil Armstrong
Q33. What is the name of the largest planet in our solar system?
👉 Answer: Jupiter
Q34. What is the name of India’s first satellite?
👉 Answer: Aryabhata
Q35. Which planet has the most number of moons?
👉 Answer: Saturn
Q36. What is the name of the first Indian to travel to space?
👉 Answer: Rakesh Sharma
Q37. What is the name of the telescope that has provided deep space images since 1990?
👉 Answer: Hubble Space Telescope
Q38. What is the Sun mainly composed of?
👉 Answer: Hydrogen and Helium
Q39. What is the smallest planet in our solar system?
👉 Answer: Mercury
Q40. What is a black hole?
👉 Answer: A region in space where gravity is so strong that nothing, not even light, can escape.
5. Modern Technology GK Questions
Q41. What does “WWW” stand for in a website URL?
👉 Answer: World Wide Web
Q42. Who is known as the “Father of the Computer”?
👉 Answer: Charles Babbage
Q43. What does “CPU” stand for?
👉 Answer: Central Processing Unit
Q44. Which company developed the Windows operating system?
👉 Answer: Microsoft
Q45. What does AI stand for in technology?
👉 Answer: Artificial Intelligence
Q46. What does USB stand for?
👉 Answer: Universal Serial Bus
Q47. What is the full form of “GPS”?
👉 Answer: Global Positioning System
Q48. Who invented the World Wide Web?
👉 Answer: Tim Berners-Lee
Q49. What does 5G stand for?
👉 Answer: 5th Generation Mobile Network
Q50. What does the term “Big Data” refer to?
👉 Answer: Large and complex datasets that require advanced computing to analyze.
Why Should You Practice Science and Technology GK Questions?
✅ Essential for Competitive Exams – Frequently asked in UPSC, SSC, Banking, Railways, NDA, CDS, and State PSCs.
✅ Enhances General Awareness – Stay updated with the latest advancements in science and technology.
✅ Improves Problem-Solving Skills – Understanding scientific principles helps in analytical thinking.
✅ Boosts Academic Knowledge – Useful for students and professionals in science and tech fields.
Final Thoughts
How many questions did you answer correctly? Keep practicing Science and Technology GK to strengthen your knowledge and improve your exam preparation.
📚 Stay curious and keep learning!