Enhance your scientific knowledge with these 100 GK questions with answers on various science topics. Perfect for quizzing and learning about the fascinating world of science.
1. What is the chemical symbol for gold?
- Answer: Au
2. Who is known as the father of modern physics?
- Answer: Albert Einstein
3. What is the process by which plants make their own food using sunlight?
- Answer: Photosynthesis
4. Which gas do plants absorb from the atmosphere during photosynthesis?
- Answer: Carbon dioxide (CO2)
5. What is the smallest unit of matter that retains the properties of an element?
- Answer: Atom
6. Who discovered penicillin, the first antibiotic?
- Answer: Alexander Fleming
7. What is the chemical formula for water?
- Answer: H2O
8. Which planet is known as the “Red Planet”?
- Answer: Mars
9. What is the chemical symbol for oxygen?
- Answer: O
10. What is the largest organ in the human body?
– Answer: Skin
11. Who proposed the theory of relativity?
– Answer: Albert Einstein
12. What is the chemical formula for table salt (sodium chloride)?
– Answer: NaCl
13. What is the process by which plants lose water vapor through their leaves?
– Answer: Transpiration
14. Who is credited with the invention of the telephone?
– Answer: Alexander Graham Bell
15. What gas do humans breathe out during respiration?
– Answer: Carbon dioxide (CO2)
16. What is the chemical formula for methane?
– Answer: CH4
17. Which gas is responsible for the Earth’s ozone layer depletion?
– Answer: Chlorofluorocarbons (CFCs)
18. Who is known as the “father of modern chemistry”?
– Answer: Antoine Lavoisier
19. What is the process by which plants bend toward a light source?
– Answer: Phototropism
20. What is the chemical formula for sulfuric acid?
– Answer: H2SO4
21. Who formulated the laws of motion?
– Answer: Sir Isaac Newton
22. What is the chemical formula for carbon dioxide?
– Answer: CO2
23. Which gas is the most abundant in the Earth’s atmosphere?
– Answer: Nitrogen (N2)
24. What is the unit of measurement for electric current?
– Answer: Ampere (A)
25. Who discovered the double helix structure of DNA?
– Answer: James Watson and Francis Crick
26. What is the chemical formula for hydrogen peroxide?
– Answer: H2O2
27. What is the SI unit of temperature?
– Answer: Kelvin (K)
28. Who is known as the “father of the periodic table”?
– Answer: Dmitri Mendeleev
29. What is the chemical formula for methane?
– Answer: CH4
30. Which gas is used in filling balloons that float in the air?
– Answer: Helium (He)
31. Who formulated the theory of evolution by natural selection?
– Answer: Charles Darwin
32. What is the chemical symbol for iron?
– Answer: Fe
33. Which gas is known as laughing gas?
– Answer: Nitrous oxide (N2O)
34. What is the chemical formula for glucose?
– Answer: C6H12O6
35. Who discovered the laws of planetary motion?
– Answer: Johannes Kepler
36. What is the chemical symbol for silver?
– Answer: Ag
37. Which gas is used in fire extinguishers?
– Answer: Carbon dioxide (CO2)
38. What is the process by which plants grow towards the Earth’s gravitational pull?
– Answer: Gravitropism
39. Who is known as the “father of modern biology”?
– Answer: Charles Darwin
40. What is the chemical formula for nitric acid?
– Answer: HNO3
41. Who is credited with the discovery of the electron?
– Answer: J.J. Thomson
42. What is the chemical symbol for potassium?
– Answer: K
43. Which gas is responsible for the greenhouse effect?
– Answer: Carbon dioxide (CO2)
44. What is the chemical formula for ammonia?
– Answer: NH3
45. Who is known as the “father of modern geology”?
– Answer: James Hutton
GK QUESTIONS WITH ANSWERS
46. What is the chemical symbol for sodium?
– Answer: Na
47. Which gas do plants release during photosynthesis?
– Answer: Oxygen (O2)
48. What is the chemical formula for sulfur dioxide?
– Answer: SO2
49. Who is known for the discovery of the circulation of blood in the human body?
– Answer: William Harvey
50. What is the chemical symbol for carbon?
– Answer: C
51. What is the process by which an organism develops from a single cell?
– Answer: Development or embryogenesis
52. Who is known for the invention of the microscope?
– Answer: Antonie van Leeuwenhoek
53. What is the chemical formula for hydrochloric acid?
– Answer: HCl
54. Which gas is used in the production of soft drinks?
– Answer: Carbon dioxide (CO2)
55. What is the chemical symbol for calcium?
– Answer: Ca
56. Who is known for the discovery of the laws of heredity?
– Answer: Gregor Mendel
57. What is the chemical formula for acetic acid, the main component of vinegar?
– Answer: CH3COOH
58. Which gas do humans inhale during respiration?
– Answer: Oxygen (O2)
59. What is the chemical symbol for nitrogen?
– Answer: N
60. Who formulated the theory of general relativity?
– Answer: Albert Einstein
61. What is the chemical formula for carbon monoxide?
– Answer: CO
62. Which gas is used in the production of fireworks for colorful explosions?
– Answer: Various metal salts (e.g., strontium, copper)
63. What is the chemical symbol for neon?
– Answer: Ne
64. Who discovered the laws of motion?
– Answer: Sir Isaac Newton
65. What is the chemical formula for formaldehyde?
– Answer: CH2O
66. Which gas is known as the “silent killer” because it is odorless and colorless?
– Answer: Carbon monoxide (CO)
67. What is the chemical symbol for copper?
– Answer: Cu
**68. Who is known for the development
of the first vaccine for smallpox?**
– Answer: Edward Jenner
69. What is the chemical formula for ozone?
– Answer: O3
70. Which gas is used in neon signs to produce colorful light?
– Answer: Neon (Ne)
71. What is the chemical symbol for mercury?
– Answer: Hg
72. Who is known for the discovery of X-rays?
– Answer: Wilhelm Conrad Roentgen
73. What is the chemical formula for carbon tetrachloride?
– Answer: CCl4
74. Which gas is essential for combustion?
– Answer: Oxygen (O2)
75. What is the chemical symbol for tin?
– Answer: Sn
76. Who is known for the development of the first polio vaccine?
– Answer: Jonas Salk
77. What is the chemical formula for sulfur hexafluoride, a gas used in electrical insulation?
– Answer: SF6
78. Which gas is commonly used in balloons for its buoyant properties?
– Answer: Helium (He)
79. What is the chemical symbol for phosphorus?
– Answer: P
80. Who is known for the discovery of radium and polonium?
– Answer: Marie Curie
81. What is the chemical formula for nitrous oxide, often used as a dental anesthetic?
– Answer: N2O
82. Which gas is used in the production of steel through the Bessemer process?
– Answer: Oxygen (O2)
83. What is the chemical symbol for lead?
– Answer: Pb
84. Who is known for the invention of the first practical electric light bulb?
– Answer: Thomas Edison
85. What is the chemical formula for potassium nitrate, a common ingredient in fireworks?
– Answer: KNO3
86. Which gas is used as a fuel for rockets?
– Answer: Liquid hydrogen (LH2) and liquid oxygen (LOX)
87. What is the chemical symbol for uranium?
– Answer: U
88. Who is known for the discovery of radioactivity?
– Answer: Henri Becquerel
89. What is the chemical formula for hydrogen sulfide, a gas with a distinctive rotten egg odor?
– Answer: H2S
90. Which gas is used in the production of soda water for carbonation?
– Answer: Carbon dioxide (CO2)
91. What is the chemical symbol for barium?
– Answer: Ba
92. Who is known for the development of the first practical steam engine?
– Answer: James Watt
93. What is the chemical formula for chloroform?
– Answer: CHCl3
94. Which gas is used in the propulsion of aerosol spray cans?
– Answer: Propellant gases (e.g., propane, butane)
95. What is the chemical symbol for helium?
– Answer: He
96. Who is known for the formulation of the laws of electromagnetism?
– Answer: James Clerk Maxwell
97. What is the chemical formula for carbon disulfide?
– Answer: CS2
98. Which gas is used in scuba diving tanks to allow underwater breathing?
– Answer: Compressed air or a mixture of gases
99. What is the chemical symbol for radon, a radioactive noble gas?
– Answer: Rn
100. Who is known for the discovery of the principles of radio transmission and communication?
– Answer: Guglielmo Marconi
Read More: Basic General Knowledge Questions and Answers for 2023