Top 50 GK Questions on Science & Inventions for AISSEE, Navodaya

If you are Preparing for competitive entrance exams like Sainik School (AISSEE), Navodaya Vidyalaya, or RIMC you need a mix of sharp conceptual understanding and smart practice. The Science & Inventions section is a important part of these exams, testing your curiosity, logic, and awareness of the world around you.

Contents hide

1 Why Science & Inventions?

2 50 MCQs on Science & Inventions for Sainik School, Navodaya, RIMC Entrance Exam

3 Check Your Answers

This post is designed to help you think like a scientist! We’ve crafted 50 creative, challenging MCQs that go beyond routine learning. These questions mixture basic principles with real-world applications – just like the ones you’ll face in your entrance exams. Dive in, challenge yourself, and double-check your answers to avoid common mistakes.

Why Science & Inventions?

Science isn’t just about facts; it’s about how and why things work. From Newton’s laws to the invention of the lightbulb, every discovery shapes our world. For your entrance exam, you’ll need to:

Understand core concepts (e.g., gravity, photosynthesis).
Recognize inventors and their contributions (e.g., Thomas Edison, CV Raman).
Apply knowledge to everyday situations (e.g., why ice floats on water).

50 MCQs on Science & Inventions for Sainik School, Navodaya, RIMC Entrance Exam

You can note down your answers on paper or in a notebook, or you can use our free OMR sheets for better practice and check them with ours, which are given at the end. Ready to test your skills? Let’s begin!

1. Which part of a bicycle works like a “wheel and axle” simple machine?
a) Pedals
b) Handlebars
c) Chain
d) Gear

2. If you mix vinegar and baking soda, which gas bubbles up?
a) Oxygen
b) Carbon dioxide
c) Hydrogen
d) Nitrogen

3. What do you call the tiny “solar panels” in plant leaves that trap sunlight?
a) Chloroplasts
b) Mitochondria
c) Nuclei
d) Roots

4. Which Indian scientist discovered light scattering, winning a Nobel Prize?
a) Homi Bhabha
b) C.V. Raman
c) Vikram Sarabhai
d) A.P.J. Abdul Kalam

5. Why do astronauts float in space?
a) No gravity
b) Less air pressure
c) Microgravity
d) Magnetic fields

6. Which invention lets you see distant stars and planets clearly?
a) Microscope
b) Thermometer
c) Telescope
d) Barometer

7. What keeps the Moon tied to Earth’s orbit?
a) Friction
b) Gravitational pull
c) Magnetic force
d) Solar wind

8. Which animal’s sonar-inspired invention helps ships navigate oceans?
a) Cat
b) Shark
c) Eagle
d) Dolphin

9. What process turns water vapor into clouds?
a) Evaporation
b) Condensation
c) Sublimation
d) Precipitation

10. Which vitamin does sunlight help your body produce?
a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin K

11. What’s the sticky liquid from trees used to make rubber?
a) Resin
b) Sap
c) Latex
d) Nectar

12. Which device measures earthquake tremors?
a) Seismograph
b) Barometer
c) Thermometer
d) Anemometer

13. Why do camels survive long desert journeys without water?
a) They store water in humps
b) Their blood retains moisture
c) They eat cacti
d) They sweat less

14. What makes your voice echo in a tunnel?
a) Refraction
b) Reflection of sound
c) Absorption
d) Vibration

15. Which metal is used in thermometers because it expands evenly?
a) Iron
b) Copper
c) Aluminum
d) Mercury

16. What force stops a rolling ball on a rough surface?
a) Friction
b) Gravity
c) Magnetism
d) Air resistance

17. Which famous scientist wrote the book Wings of Fire?
a) Stephen Hawking
b) A.P.J. Abdul Kalam
c) Isaac Newton
d) Nikola Tesla

18. What do bees collect from flowers to make honey?
a) Pollen
b) Petals
c) Nectar
d) Seeds

19. Which planet spins on its side, looking like a rolling ball?
a) Uranus
b) Saturn
c) Mars
d) Venus

20. What’s the main gas released by burning fossil fuels?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Methane

21. Which insect-inspired invention helps surgeons stitch wounds?
a) Ant jaws
b) Bee stingers
c) Spider silk
d) Butterfly wings

22. What part of the eye controls how much light enters?
a) Retina
b) Cornea
c) Lens
d) Iris

23. Which invention by Alexander Fleming saved millions from infections?
a) X-ray
b) Penicillin
c) Stethoscope
d) DNA model

24. Why do raisins soak up water when kept in a bowl overnight?
a) Osmosis
b) Photosynthesis
c) Fermentation
d) Combustion

25. What’s the hardest natural substance on Earth?
a) Diamond
b) Iron
c) Gold
d) Quartz

26. Which everyday tool works like a “lever” to pry open lids?
a) Scissors
b) Spoon
c) Bottle opener
d) Hammer

27. What happens to iron when it reacts with oxygen and water?
a) It melts
b) It shrinks
c) It rusts
d) It glows

28. Which scientist discovered that germs cause diseases?
a) Louis Pasteur
b) Charles Darwin
c) Gregor Mendel
d) Robert Hooke

29. Why does a balloon stick to the wall after rubbing it on hair?
a) Magnetic force
b) Gravity
c) Static electricity
d) Air pressure

30. Which plant part carries water from roots to leaves?
a) Stem
b) Flower
c) Fruit
d) Bark

31. What do you call the tiny “building blocks” of all living things?
a) Atoms
b) Cells
c) Molecules
d) Organs

32. Which Indian mathematician invented the number “zero”?
a) Aryabhata
b) Bhaskara
c) Ramanujan
d) Brahmagupta

33. What makes a compass needle always point north?
a) Earth’s magnetic field
b) Wind direction
c) Ocean currents
d) Solar energy

34. Which gas fills party balloons to make them float?
a) Oxygen
b) Carbon dioxide
c) Helium
d) Nitrogen

35. What is the process of a caterpillar turning into a butterfly called?
a) Photosynthesis
b) Respiration
c) Hibernation
d) Metamorphosis

36. Which device converts sunlight directly into electricity?
a) Dynamo
b) Turbine
c) Solar panel
d) Battery

37. Why do we add salt to icy roads in winter?
a) To melt ice faster
b) To make roads colorful
c) To attract sunlight
d) To prevent accidents

38. Which vitamin helps your blood clot when you get a cut?
a) Vitamin A
b) Vitamin C
c) Vitamin K
d) Vitamin B12

39. What is the main function of white blood cells?
a) Carry oxygen
b) Strengthen bones
c) Digest food
d) Fight infections

40. Which fruit’s acidity can light up a bulb in a science experiment?
a) Banana
b) Lemon
c) Apple
d) Mango

41. Who invented the first practical electric light bulb?
a) Thomas Edison
b) Nikola Tesla
c) Alexander Graham Bell
d) Benjamin Franklin

42. What causes the Northern Lights (Aurora Borealis)?
a) Moonlight reflection
b) Solar winds hitting Earth’s atmosphere
c) Volcanic eruptions
d) Ocean currents

43. What gives the Taj Mahal its yellow tint over time?
a) Air pollution
b) Water erosion
c) Fungal growth
d) Solar radiation

44. Which invention by Johannes Gutenberg revolutionized the spread of knowledge in the 15th century?
a) Telegraph
b) Compass
c) Steam Engine
d) Printing Press

45. What everyday item uses Archimedes’ principle to measure density?
a) Thermometer
b) Hydrometer
c) Speedometer
d) Barometer

46. The invention of the “lightning rod” is credited to which scientist?
a) Isaac Newton
b) Benjamin Franklin
c) Thomas Edison
d) Nikola Tesla

47. Combustion (burning) requires three things: fuel, heat, and ______.
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Water

48. Which Indian scientist invented the “Crescograph” to study plant growth?
a) Homi Bhabha
b) C.V. Raman
c) Jagadish Chandra Bose
d) A.P.J. Abdul Kalam

49. Which invention allowed humans to travel faster than horses for the first time?
a) Bicycle
b) Airplane
c) Steam Locomotive
d) Hot Air Balloon

50. What lifesaving medical tool did René Laennec invent in 1816?
a) Stethoscope
b) Thermometer
c) Syringe
d) X-ray machine

Check Your Answers

Below are the correct answers to the MCQs. Download the PDF to compare your responses and track your progress. For better practice, use our free OMR sheets to simulate the real exam experience.

Download Answer Key PDF