These questions cover a broad range of scientific topics that could be useful for preparing for RRB exams like NTPC, Group D, JE, ALP, and others.
1. Who is known as the “Father of Modern Physics”?
a) Isaac Newton
b) Albert Einstein
c) Nikola Tesla
d) Galileo Galilei
Answer: b) Albert Einstein
2. What is the chemical symbol for water?
a) O2
b) CO2
c) H2O
d) O3
Answer: c) H2O
3. Which gas is most abundant in the Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: b) Nitrogen
4. The unit of electric current is:
a) Watt
b) Volt
c) Ampere
d) Ohm
Answer: c) Ampere
5. What is the primary source of energy for the Sun?
a) Nuclear fission
b) Gravitational pull
c) Nuclear fusion
d) Chemical reaction
Answer: c) Nuclear fusion
6. The process by which plants prepare their own food using sunlight is called:
a) Photosynthesis
b) Respiration
c) Germination
d) Pollination
Answer: a) Photosynthesis
7. The hardest naturally occurring substance on Earth is:
a) Gold
b) Iron
c) Diamond
d) Platinum
Answer: c) Diamond
8. What is the boiling point of water at sea level?
a) 50°C
b) 100°C
c) 150°C
d) 200°C
Answer: b) 100°C
9. Which of the following is a noble gas?
a) Oxygen
b) Nitrogen
c) Helium
d) Hydrogen
Answer: c) Helium
10. Who discovered the law of gravity?
a) Albert Einstein
b) Isaac Newton
c) Galileo Galilei
d) Nikola Tesla
Answer: b) Isaac Newton
11. What is the primary function of white blood cells in the human body?
a) Carry oxygen
b) Digest food
c) Fight infections
d) Transport nutrients
Answer: c) Fight infections
12. What is the chemical formula for methane?
a) CH3
b) C2H6
c) CH4
d) CO2
Answer: c) CH4
13. What type of energy is stored in food?
a) Kinetic energy
b) Potential energy
c) Chemical energy
d) Solar energy
Answer: c) Chemical energy
14. What is the unit of measurement for frequency?
a) Volt
b) Ampere
c) Hertz
d) Ohm
Answer: c) Hertz
15. Which planet is known as the “Red Planet”?
a) Venus
b) Mars
c) Jupiter
d) Saturn
Answer: b) Mars
16. What is the main component of Earth’s atmosphere?
a) Oxygen
b) Nitrogen
c) Carbon Dioxide
d) Argon
Answer: b) Nitrogen
17. The phenomenon of bending of light when it passes from one medium to another is called:
a) Reflection
b) Refraction
c) Diffusion
d) Dispersion
Answer: b) Refraction
18. Who invented the telephone?
a) Nikola Tesla
b) Alexander Graham Bell
c) Thomas Edison
d) Michael Faraday
Answer: b) Alexander Graham Bell
19. The process of liquid turning into vapor is called:
a) Melting
b) Freezing
c) Evaporation
d) Condensation
Answer: c) Evaporation
20. The study of fungi is known as:
a) Botany
b) Zoology
c) Mycology
d) Entomology
Answer: c) Mycology
21. What is the main component of the cell wall in plants?
a) Protein
b) Carbohydrates
c) Cellulose
d) Lipids
Answer: c) Cellulose
22. Which part of the human brain controls balance and coordination?
a) Cerebrum
b) Cerebellum
c) Medulla
d) Thalamus
Answer: b) Cerebellum
23. What is the atomic number of Carbon?
a) 6
b) 8
c) 12
d) 14
Answer: a) 6
24. What is the process by which plants lose water through their leaves?
a) Transpiration
b) Evaporation
c) Respiration
d) Photosynthesis
Answer: a) Transpiration
25. The greenhouse effect is mainly caused by an increase in which gas in the atmosphere?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Helium
Answer: b) Carbon dioxide
26. Which of the following is an example of an exothermic reaction?
a) Photosynthesis
b) Freezing of water
c) Burning of wood
d) Melting of ice
Answer: c) Burning of wood
27. What is the boiling point of water in Kelvin?
a) 273 K
b) 373 K
c) 500 K
d) 1000 K
Answer: b) 373 K
28. Who is known for the theory of evolution through natural selection?
a) Albert Einstein
b) Charles Darwin
c) Gregor Mendel
d) Louis Pasteur
Answer: b) Charles Darwin
29. What is the main function of the chloroplasts in plant cells?
a) To store energy
b) To control the cell’s activities
c) To conduct photosynthesis
d) To help in cell division
Answer: c) To conduct photosynthesis
30. What is the most abundant element in the Earth’s crust?
a) Iron
b) Oxygen
c) Silicon
d) Calcium
Answer: b) Oxygen
31. What is the chemical symbol for the element Gold?
a) Au
b) Ag
c) Pb
d) Fe
Answer: a) Au
32. What is the primary cause of seasons on Earth?
a) Earth’s distance from the Sun
b) Tilt of Earth’s axis
c) Rotation of Earth
d) Revolution of the Moon around Earth
Answer: b) Tilt of Earth’s axis
33. Which of the following is the main function of red blood cells in humans?
a) Fight infections
b) Transport oxygen
c) Control body temperature
d) Aid in digestion
Answer: b) Transport oxygen
34. What is the SI unit of force?
a) Newton
b) Joule
c) Watt
d) Pascal
Answer: a) Newton
35. Which of the following elements is a noble gas?
a) Helium
b) Nitrogen
c) Oxygen
d) Hydrogen
Answer: a) Helium
36. Which planet has the most moons?
a) Earth
b) Mars
c) Jupiter
d) Saturn
Answer: c) Jupiter
37. Which of the following is a property of a magnet?
a) It can attract iron
b) It can conduct electricity
c) It has a permanent charge
d) It produces heat
Answer: a) It can attract iron
38. What is the name of the process by which a liquid changes into a gas?
a) Melting
b) Freezing
c) Condensation
d) Evaporation
Answer: d) Evaporation
39. Who invented the first practical telephone?
a) Nikola Tesla
b) Thomas Edison
c) Alexander Graham Bell
d) James Watt
Answer: c) Alexander Graham Bell
40. What is the main difference between plant and animal cells?
a) Animal cells have a cell wall; plant cells do not
b) Plant cells have chloroplasts; animal cells do not
c) Animal cells have a nucleus; plant cells do not
d) Plant cells have a nucleus; animal cells do not
Answer: b) Plant cells have chloroplasts; animal cells do not
41. Which gas do plants absorb during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Answer: b) Carbon dioxide
42. The Earth’s atmosphere is composed primarily of which two gases?
a) Oxygen and carbon dioxide
b) Nitrogen and oxygen
c) Oxygen and argon
d) Carbon dioxide and nitrogen
Answer: b) Nitrogen and oxygen
43. Which of the following is NOT a form of energy?
a) Light
b) Sound
c) Water
d) Heat
Answer: c) Water
44. Which organ in the human body is responsible for pumping blood?
a) Brain
b) Lungs
c) Heart
d) Liver
Answer: c) Heart
45. In which part of the human body is insulin produced?
a) Liver
b) Pancreas
c) Stomach
d) Kidneys
Answer: b) Pancreas
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