(500+) Science GK Questions with Answers for every Student

Science is one of the most fascinating subjects that helps us understand the world around us. If you’re looking for the best Science GK Questions , this guide covers everything you need from basic science GK questions to advanced general science questions. Whether you’re preparing for school exams, competitive tests, or simply want to boost your knowledge, our collection of science GK questions with answers will help you learn quickly and effectively.

We’ve included science GK questions in Hindi, English, Kannada, and Tamil, making this resource useful for every learner across India. You’ll also find specialized sections like social science GK questions, political science GK questions, computer science GK questions , and science and technology GK questions. All these are carefully curated to support students and aspirants of all levels. So, start exploring and strengthen your knowledge with these science GK questions that make learning both easy and interesting.

Science GK Questions

What is the chemical formula of water?
H₂O

Who is known as the father of modern physics?
Albert Einstein

What planet is known as the Red Planet?
Mars

What gas do plants absorb during photosynthesis?
Carbon dioxide (CO₂)

What is the speed of light?
3 × 10⁸ m/s

What is the main organ of the human circulatory system?
Heart

What is the SI unit of force?
Newton (N)

What part of the plant conducts photosynthesis?
Leaf

Who discovered penicillin?
Alexander Fleming

Which metal is liquid at room temperature?
Mercury (Hg)

What is the hardest natural substance on Earth?
Diamond

Which vitamin is produced when skin is exposed to sunlight?
Vitamin D

What device is used to measure temperature?
Thermometer

What is the powerhouse of the cell?
Mitochondria

Which planet has the most moons?
Saturn

What is the process by which water changes into vapor?
Evaporation

What is the boiling point of water?
100°C

What is the center of an atom called?
Nucleus

Which element is essential for respiration?
Oxygen (O₂)

Who invented the electric bulb?
Thomas Edison

Science GK Questions in Hindi | विज्ञान सामान्य ज्ञान प्रश्न

जल का रासायनिक सूत्र क्या है?	H₂O
प्रकाश की गति क्या है?	3 × 10⁸ मी/से
पृथ्वी का प्राकृतिक उपग्रह कौन है?	चंद्रमा
सूर्य का मुख्य गैस तत्व कौन सा है?	हाइड्रोजन
विद्युत धारा की इकाई क्या है?	एम्पीयर
मानव शरीर की सबसे बड़ी हड्डी कौन सी है?	फीमर (जांघ की हड्डी)
इंसान के शरीर में कितनी हड्डियाँ होती हैं?	206
कौन-सा विटामिन आंखों के लिए आवश्यक है?	विटामिन A
गैस बल्ब में कौन-सी गैस भरी होती है?	आर्गन
पादपों में भोजन बनने की प्रक्रिया क्या कहलाती है?	प्रकाश संश्लेषण
दूध से दही बनने की प्रक्रिया में कौन-सा जीवाणु मदद करता है?	लैक्टोबैसिलस
कंप्यूटर का मस्तिष्क किसे कहा जाता है?	CPU
जलवायु परिवर्तन का मुख्य कारण क्या है?	ग्रीनहाउस गैसें
विद्युत बल्ब का आविष्कार किसने किया?	थॉमस एडिसन
हमारे सौरमंडल में सबसे बड़ा ग्रह कौन सा है?	बृहस्पति (Jupiter)

Science GK Questions with Answers

• Q1. What is photosynthesis?
• Ans. It is the process by which green plants make their food using sunlight, carbon dioxide, and water.
• Q2. Who invented the telephone?
• Ans. Alexander Graham Bell invented the telephone in 1876.
• Q3. What is the main function of red blood cells?
• Ans. They carry oxygen from the lungs to different parts of the body.
• Q4. What is the unit of energy?
• Ans. The SI unit of energy is Joule (J).
• Q5. What gas is used for breathing by living organisms?
• Ans. Oxygen is used for breathing.
• Q6. Which part of the human brain controls balance and posture?
• Ans. The cerebellum controls balance and posture.
• Q7. What is Newton’s first law of motion?
• Ans. A body remains at rest or in uniform motion unless acted upon by an external force.
• Q8. Which organ purifies blood in the human body?
• Ans. The kidneys purify blood.
• Q9. What is the chemical symbol of iron?
• Ans. The chemical symbol is Fe.
• Q10. What instrument is used to measure air pressure?
• Ans. Barometer.
• Q11. Which scientist gave the theory of evolution?
• Ans. Charles Darwin.
• Q12. What is the pH value of pure water?
• Ans. The pH value of pure water is 7.
• Q13. What is the process of liquid changing into gas called?
• Ans. It is called evaporation.

Science GK Questions in English

What is the symbol of Sodium?
Na

Who discovered gravity?
Isaac Newton

Which gas is known as laughing gas?
Nitrous Oxide (N₂O)

What is the largest planet in our solar system?
Jupiter

What part of the human body controls balance?
Cerebellum

What is the process of conversion of water vapor into water called?
Condensation

Which instrument is used to measure air pressure?
Barometer

Which organ purifies blood in the human body?
Kidney

What type of energy is stored in a stretched rubber band?
Potential energy

What is the hardest part of the human body?
Tooth enamel

Which gas is used in fire extinguishers?
Carbon dioxide (CO₂)

What is the unit of electric current?
Ampere

Which planet is closest to the Sun?
Mercury

What is the main source of energy for Earth?
Sun

What is the study of living organisms called?
Biology

What is the chemical formula of common salt?
NaCl

Which organ helps in respiration?
Lungs

What is the basic unit of life?
Cell

Which part of the eye controls the amount of light entering it?
Pupil

Who invented the telephone?
Alexander Graham Bell

Science GK Questions in Kannada

ವಿಜ್ಞಾನ ಪ್ರಶ್ನೆಗಳು (Science Questions)	ಉತ್ತರಗಳು (Answers)
ನೀರಿನ ರಾಸಾಯನಿಕ ಸೂತ್ರವೇನು?	H₂O
ಬೆಳಕಿನ ವೇಗ ಎಷ್ಟು?	3 × 10⁸ ಮೀ/ಸೆ
ಮಾನವನ ದೇಹದ ಅತಿ ದೊಡ್ಡ ಅಂಗ ಯಾವುದು?	ಚರ್ಮ (Skin)
ಸೌರಮಂಡಲದ ಕೇಂದ್ರ ಯಾವುದು?	ಸೂರ್ಯ
ವಿದ್ಯುತ್ ಪ್ರವಾಹದ ಘಟಕ ಯಾವುದು?	ಆಂಪಿಯರ್ (Ampere)
ಹಸಿರು ಸಸ್ಯಗಳು ಆಹಾರ ತಯಾರಿಸುವ ಪ್ರಕ್ರಿಯೆ ಯಾವುದು?	ಪ್ರಕಾಶ ಸಂಶ್ಲೇಷಣ (Photosynthesis)
ಯಾವ ಅನಿಲವನ್ನು ಸಸ್ಯಗಳು ಉಸಿರಾಟದಲ್ಲಿ ಬಿಡುಗಡೆ ಮಾಡುತ್ತವೆ?	ಆಮ್ಲಜನಕ (Oxygen)
ಮಾನವ ದೇಹದ ಹೃದಯ ಯಾವ ಸ್ಥಳದಲ್ಲಿದೆ?	ಎದೆ ಭಾಗದಲ್ಲಿ (Chest)
ತಾಪಮಾನವನ್ನು ಅಳೆಯುವ ಸಾಧನ ಯಾವುದು?	ತಾಪಮಾನಮಾಪಕ (Thermometer)
ಜಲವು ವಾಯು ರೂಪಕ್ಕೆ ಬದಲಾಗುವ ಪ್ರಕ್ರಿಯೆ ಯಾವುದು?	ಆವೀಕರಣ (Evaporation)
ಹಾಲಿನಿಂದ ಮೊಸರು ತಯಾರಿಸುವ ಬ್ಯಾಕ್ಟೀರಿಯಾ ಯಾವುದು?	ಲ್ಯಾಕ್ಟೋಬ್ಯಾಸಿಲಸ್ (Lactobacillus)
ಜೀವಿಗಳ ಅಧ್ಯಯನವನ್ನು ಏನು ಎನ್ನುತ್ತಾರೆ?	ಜೀವಶಾಸ್ತ್ರ (Biology)
ವಾಯು ಒತ್ತಡವನ್ನು ಅಳೆಯುವ ಸಾಧನ ಯಾವುದು?	ಬಾರೋಮೀಟರ್ (Barometer)
ಮಾನವನ ದೇಹದ ಶ್ವಾಸಕೋಶ ಎಲ್ಲಿ ಇದೆ?	ಎದೆ ಭಾಗದಲ್ಲಿ (Chest cavity)
ವಿದ್ಯುತ್ ಬಲ್ಬ್‌ನ ಆವಿಷ್ಕಾರ ಯಾರದು?	ಥಾಮಸ್ ಎಡಿಸನ್
ಮಾನವನ ದೇಹದ ಅತಿ ಚಿಕ್ಕ ಎಲುಬು ಯಾವುದು?	ಸ್ಟೇಪ್ಸ್ (Stapes)
ನಮ್ಮ ಸೌರಮಂಡಲದ ಅತಿ ಚಿಕ್ಕ ಗ್ರಹ ಯಾವುದು?	ಬುಧ (Mercury)
ಕಲ್ಲಿದ್ದಲಿನ ಪ್ರಮುಖ ಅಂಶ ಯಾವುದು?	ಕಾರ್ಬನ್ (Carbon)
ಶಬ್ದದ ವೇಗ ಎಷ್ಟು?	343 ಮೀ/ಸೆ
ಮಾನವನ ಹೃದಯದಲ್ಲಿ ಎಷ್ಟು ಕೋಣೆಗಳಿವೆ?	4

Science GK Questions in Tamil

• நீரின் வேதியியல் வாய்பாடு என்ன?
• H₂O
• சூரியனுக்கு மிக அருகிலுள்ள கோள் எது?
• புதன் (Mercury)
• மனித உடலில் இரத்தத்தை வடிகட்டும் உறுப்பு எது?
• சிறுநீரகம் (Kidney)
• உயிரின் அடிப்படை அலகு எது?
• செல் (Cell)
• ஒளிச்சேர்க்கை நிகழும் தாவரத்தின் பகுதி எது?
• இலை (Leaf)
• பூமியின் இயற்கை துணைக்கோள் எது?
• சந்திரன் (Moon)
• மின்னழுத்தத்தின் அலகு எது?
• வோல்ட் (Volt)
• மின்சார விளக்கை கண்டுபிடித்தவர் யார்?
• தாமஸ் எடிசன்
• மனித உடலின் மிகப்பெரிய எலும்பு எது?
• ஃபீமர் (Femur)
• மனிதனின் இதயம் எங்கே உள்ளது?
• மார்பு பகுதியில் (Chest)
• எந்த கிரகம் “சிவப்பு கிரகம்” என்று அழைக்கப்படுகிறது?
• செவ்வாய் (Mars)
• பனியின் உருகும் புள்ளி எது?
• 0°C
• தாவரங்கள் எதை சுவாசிக்கின்றன?
• கார்பன் டை ஆக்சைடு (CO₂)
• மனிதனின் உடலில் சக்தி உற்பத்தி செய்யும் உறுப்பு எது?
• மைட்டோகாண்ட்ரியா (Mitochondria)
• மனித உடலில் எத்தனை எலும்புகள் உள்ளன?
• 206
• மின்சாரத்தின் ஓட்டத்தை அளக்கும் கருவி எது?
• அம்மீட்டர் (Ammeter)
• பூமியின் மையம் எப்படிச் சொல்லப்படுகிறது?
• நியூக்ளியஸ் (Nucleus)
• தங்கத்தின் வேதியியல் குறியீடு என்ன?
• Au
• எந்த வாயு தீ அணைப்பான் கருவியில் பயன்படுத்தப்படுகிறது?
• கார்பன் டை ஆக்சைடு (CO₂)
• எது பூமியின் கடினமான இயற்கை பொருள்?
• வைரம் (Diamond)
• மனிதன் தன்னுடைய உடலில் வெளிச்சத்துடன் உற்பத்தி செய்யும் வைட்டமின் எது?
• வைட்டமின் D
• உயிரியல் என்றால் என்ன?
• உயிர்களின் அறிவியல் (Science of life)
• ஒளியின் வேகம் எவ்வளவு?
• 3 × 10⁸ மீ/விநா
• காற்றழுத்தம் அளக்கும் கருவி எது?
• பரோமீட்டர் (Barometer)
• தொலைபேசியை கண்டுபிடித்தவர் யார்?
• அலெக்சாண்டர் கிராம் பெல் (Alexander Graham Bell)

Social Science GK Questions

• Who is known as the Father of the Indian Constitution?
  Dr. B. R. Ambedkar
• What is the capital of India?
  New Delhi
• Who was the first President of India?
  Dr. Rajendra Prasad
• In which year did India get independence?
  1947
• Who was the first Prime Minister of India?
  Pandit Jawaharlal Nehru
• What is the national currency of India?
  Indian Rupee (₹)
• Who discovered the sea route to India?
  Vasco da Gama
• What is the largest continent in the world?
  Asia
• Which river is known as the Ganga of the South?
  Godavari River
• Who wrote the Indian National Anthem?
  Rabindranath Tagore
• What is the smallest state in India by area?
  Goa
• Who was known as the Iron Man of India?
  Sardar Vallabhbhai Patel
• In which state is the city of Jaipur located?
  Rajasthan
• What is the study of Earth called?
  Geography
• What is the highest civilian award in India?
  Bharat Ratna
• Which revolution is known as the Green Revolution?
  Agricultural Revolution in India (led by M. S. Swaminathan)
• What is the longest river in India?
  Ganga River
• Who was the first woman Prime Minister of India?
  Indira Gandhi
• Which is the southernmost tip of India?
  Kanyakumari
• When was the Indian Constitution adopted?
  26th January 1950

Political Science GK Questions

1. Who is known as the Father of the Indian Constitution?
   Dr. B. R. Ambedkar
2. When was the Indian Constitution adopted?
   26 January 1950
3. Who is the head of the Indian state?
   The President of India
4. Who is the head of the Indian government?
   The Prime Minister of India
5. What type of government does India have?
   Parliamentary democracy
6. How many members are there in the Rajya Sabha?
   250 (maximum limit)
7. What is the minimum age for becoming a Member of Parliament (Lok Sabha)?
   25 years
8. Which article of the Constitution deals with Fundamental Rights?
   Articles 12 to 35
9. Who appoints the Chief Justice of India?
   The President of India
10. Which part of the Constitution deals with Directive Principles of State Policy?
    Part IV

General Science GK Questions

Question	Answer
What is the chemical symbol for Oxygen?	O
Who invented the telephone?	Alexander Graham Bell
What planet is known as the Red Planet?	Mars
What is the speed of light?	3 × 10⁸ m/s
Which gas do plants absorb during photosynthesis?	Carbon dioxide (CO₂)
What is the unit of force?	Newton (N)
Who discovered penicillin?	Alexander Fleming
What organ pumps blood in the human body?	Heart
Which vitamin is produced when skin is exposed to sunlight?	Vitamin D
What is the powerhouse of the cell?	Mitochondria
What is the process of changing water into vapor called?	Evaporation
What is the SI unit of electric current?	Ampere
Which metal is liquid at room temperature?	Mercury (Hg)
What is the main source of energy on Earth?	Sun
Who is known as the Father of Modern Physics?	Albert Einstein
What is the chemical formula of water?	H₂O
Which organ purifies blood in the human body?	Kidney
What is the natural satellite of Earth?	Moon
What is the study of living organisms called?	Biology
Which gas is used in fire extinguishers?	Carbon dioxide (CO₂)

Computer Science GK Questions

1. Who is known as the Father of Computers?
Charles Babbage

2. What does CPU stand for?
Central Processing Unit

3. What is the brain of the computer?
CPU

4. What is the full form of HTTP?
HyperText Transfer Protocol

5. Which device is used for input in a computer?
Keyboard

6. What does RAM stand for?
Random Access Memory

7. Which computer language is used for web development?
HTML

8. What is the full form of AI?
Artificial Intelligence

9. Who founded Microsoft?
Bill Gates and Paul Allen

10. Which part of the computer is used to store data permanently?
Hard Disk

11. What is the full form of USB?
Universal Serial Bus

12. What is the full form of PDF?
Portable Document Format

13. What is the full form of IP?
Internet Protocol

14. What does URL stand for?
Uniform Resource Locator

15. What is the full form of LAN?
Local Area Network

16. What is the full form of WAN?
Wide Area Network

17. What is the full form of Wi-Fi?
Wireless Fidelity

18. What does BIOS stand for?
Basic Input Output System

19. What is the full form of DNS?
Domain Name System

20. What is the full form of VPN?
Virtual Private Network

21. Which device displays information from a computer?
Monitor

22. What is the smallest unit of data in a computer?
Bit

23. What does OS stand for?
Operating System

24. What is the full form of GUI?
Graphical User Interface

25. What is the full form of CPU’s ALU?
Arithmetic Logic Unit

26. What is the function of a router?
To connect multiple networks and route data between them

27. What is the full form of SMS?
Short Message Service

28. What is the shortcut key for Copy on a computer?
Ctrl + C

29. Which company developed the Windows operating system?
Microsoft

30. What does HTML stand for?
HyperText Markup Language

31. What is the full form of SEO?
Search Engine Optimization

32. What is the full form of IP Address?
Internet Protocol Address

33. What does SQL stand for?
Structured Query Language

34. What is the full form of ICT?
Information and Communication Technology

35. What is the full form of CAD?
Computer-Aided Design

36. What is the full form of CD-ROM?
Compact Disc Read Only Memory

37. What is the full form of DOS?
Disk Operating System

38. What is the full form of ISP?
Internet Service Provider

39. What is the full form of ASCII?
American Standard Code for Information Interchange

40. What is the use of a printer?
To produce hard copies of digital documents

Basic Science GK Questions

Question	Answer
What is the SI unit of temperature?	Kelvin (K)
Who proposed the theory of relativity?	Albert Einstein
Which gas is known as laughing gas?	Nitrous Oxide (N₂O)
Which planet is closest to the Sun?	Mercury
What is the study of heredity called?	Genetics
Which organ purifies blood in the human body?	Kidney
What is the scientific name of human beings?	Homo sapiens
Which part of the cell contains genetic material?	Nucleus
Which gas is known as “marsh gas”?	Methane (CH₄)
Which element is used in making pencils?	Carbon (Graphite)
What is the most abundant gas in Earth’s atmosphere?	Nitrogen (N₂)
Which vitamin is also known as Ascorbic Acid?	Vitamin C
What type of energy is stored in food?	Chemical energy
What is the instrument used to measure air pressure?	Barometer
Which scientist discovered the X-rays?	Wilhelm Conrad Roentgen
What is the pH value of pure water?	7
Which planet is known as the Morning Star?	Venus
Which part of the human body produces insulin?	Pancreas
Which gas is filled in balloons to make them float?	Helium
Which metal is used in making thermometers?	Mercury
What is the natural satellite of Earth called?	Moon
Which process converts water vapor into liquid water?	Condensation
Which organ of the body controls all functions?	Brain
What is the main source of energy for Earth?	Sun
Which disease is caused by deficiency of iodine?	Goiter

Related To Science GK Questions

1. Which process converts solid directly into gas?
   Sublimation
2. What is the study of earthquakes called?
   Seismology
3. What is the branch of science dealing with heredity?
   Genetics
4. What is the unit of electric power?
   Watt
5. Which metal is most commonly used in electric wires?
   Copper
6. What is the main gas found in the atmosphere?
   Nitrogen
7. Which organ in humans maintains balance and posture?
   Cerebellum
8. What is the study of stars and planets called?
   Astronomy
9. Which scientist proposed the theory of evolution?
   Charles Darwin
10. What is used to measure humidity?
    Hygrometer
11. Which planet has the shortest day?
    Jupiter
12. What is the hardest known natural substance?
    Diamond
13. What is the main function of white blood cells?
    To fight infections
14. Which instrument is used to measure atmospheric pressure?
    Barometer
15. What is the chemical formula of ozone?
    O₃
16. Which vitamin is produced in the skin by sunlight?
    Vitamin D
17. Which planet is known as the “Red Planet”?
    Mars
18. What is the process of water cycle evaporation and condensation called?
    Hydrological Cycle
19. Who invented the telephone?
    Alexander Graham Bell
20. What is the main source of energy for plants?
    Sunlight
21. Which part of the eye controls the amount of light entering it?
    Pupil

Science And Technology GK Questions

• What does ISRO stand for?
  Indian Space Research Organisation
• Who was the first Indian in space?
  Rakesh Sharma
• Which is the first artificial satellite launched by India?
  Aryabhata
• What is the full form of NASA?
  National Aeronautics and Space Administration
• Which Indian missile is known as “Agni”?
  A long-range ballistic missile
• What is the name of India’s first supercomputer?
  PARAM 8000
• Which metal is used in making computer chips?
  Silicon
• What is robotics?
  The science of designing and operating robots
• Which technology is used for wireless communication?
  Bluetooth
• Who invented the World Wide Web (WWW)?
  Tim Berners-Lee
• Which is India’s first indigenous satellite launch vehicle?
  SLV-3
• Who is known as the Missile Man of India?
  Dr. A.P.J. Abdul Kalam
• What is the full form of GPS?
  Global Positioning System
• Which Indian mission discovered water on the Moon?
  Chandrayaan-1
• What is the full form of LED?
  Light Emitting Diode
• Which planet has been explored by the Mars Orbiter Mission (Mangalyaan)?
  Mars
• What is the main function of a microprocessor?
  To perform calculations and execute instructions
• Which device is used to convert solar energy into electricity?
  Solar cell
• What is the full form of USB?
  Universal Serial Bus
• Which Indian organization develops defense technology?
  DRDO (Defence Research and Development Organisation)
• What does 3G, 4G, and 5G in mobile technology refer to?
  Generations of mobile communication technology
• What is the purpose of artificial intelligence (AI)?
  To enable machines to perform tasks that require human intelligence

Conclusion:

In conclusion, Science GK Questions are a great way to expand your understanding of the world of science and technology. Whether you’re revising general science GK questions, testing your memory with basic science GK questions, or exploring topics like computer science and political science, this collection helps you learn in a smart, structured way.

No matter your language preference be it science GK questions in Hindi, English, Kannada, or Tamil these questions are designed to make learning engaging and exam-ready. Keep practicing regularly, explore more social science GK questions, and stay updated with new science and technology GK questions to boost your confidence and stay ahead in every quiz or exam.

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