SCIENCE (विज्ञान)

1. What is the chemical symbol of water?

Ans:- H₂O

2. How many bones are in the human body?

Ans:- 206

3. What gas do humans breathe in?

Ans:- Oxygen

4. What gas do plants absorb?

Ans:- Carbon dioxide

5. What planet is called the Red Planet?

Ans:- Mars

6. What is the largest planet?

Ans:- Jupiter

7. What is the smallest planet?

Ans:- Mercury

8. How many planets are in the solar system?

Ans:- 8

9. What is the boiling point of water?

Ans:- 100°C

10. What is the freezing point of water?

Ans:- 0°C

11. What is the center of the solar system?

Ans:- Sun

12. What part of the plant makes food?

Ans:- Leaves

13. What is the nearest star to Earth?

Ans:- Sun

14. Which vitamin do we get from sunlight?

Ans:- Vitamin D

15. What is the hardest natural substance?

Ans:- Diamond

16. What is the chemical symbol of gold?

Ans:- Au

17. What is the chemical symbol of oxygen?

Ans:- O

18. What force pulls objects toward Earth?

Ans:- Gravity

19. What is the study of plants called?

Ans:- Botany

20. What is the study of animals called?

Ans:- Zoology

21. What is the largest organ in the human body?

Ans:- Skin

22. How many hearts does an octopus have?

Ans:- Three

23. What is the speed of light?

Ans:- 3 × 10⁸ m/s

24. What is the unit of electricity?

Ans:- Watt

25. What is the chemical symbol of sodium?

Ans:- Na

26. What is the chemical symbol of iron?

Ans:- Fe

27. What is the chemical symbol of silver?

Ans:- Ag

28. What is the chemical symbol of potassium?

Ans:- K

29. What is the SI unit of force?

Ans:- Newton

30. What is the SI unit of energy?

Ans:- Joule

31. What is the SI unit of temperature?

Ans:- Kelvin

32. What is the powerhouse of the cell?

Ans:- Mitochondria

33. What is the largest planet in our solar system?

Ans:- Jupiter

34. What is the smallest bone in the human body?

Ans:- Stapes

35. What blood group is known as the universal donor?

Ans:- O negative

36. What blood group is known as the universal recipient?

Ans:- AB positive

37. What is the study of the Earth called?

Ans:- Geology

38. What is the study of stars called?

Ans:- Astronomy

39. What is the study of human body called?

Ans:- Anatomy

40. What is the nearest planet to the Sun?

Ans:- Mercury

41. What is the main gas in Earth’s atmosphere?

Ans:- Nitrogen

42. What instrument measures temperature?

Ans:- Thermometer

43. What instrument measures air pressure?

Ans:- Barometer

44. What instrument measures earthquakes?

Ans:- Seismograph

45. What is the main source of energy for Earth?

Ans:- Sun

46. How many chambers are in the human heart?

Ans:- 4

47. Which organ purifies blood in the human body?

Ans:- Kidney

48. What is the normal body temperature?

Ans:- 37°C

49. What vitamin is good for eyesight?

Ans:- Vitamin A

50. What is the chemical formula of carbon dioxide?

Ans:- CO₂

51. What is the chemical symbol of hydrogen?

Ans:- H

52. What is the chemical symbol of nitrogen?

Ans:- N

53. What is the chemical symbol of calcium?

Ans:- Ca

54. What is the unit of current?

Ans:- Ampere

55. What is the unit of power?

Ans:- Watt

56. What is the unit of resistance?

Ans:- Ohm

57. Which part of the brain controls thinking?

Ans:- Cerebrum

58. Which blood cells fight infection?

Ans:- White blood cells

59. What is the basic unit of life?

Ans:- Cell

60. What is the largest bone in the human body?

Ans:- Femur

61. What is the smallest planet in the solar system?

Ans:- Mercury

62. Which planet is known as Earth’s twin?

Ans:- Venus

63. What is the study of weather called?

Ans:- Meteorology

64. What is the study of fossils called?

Ans:- Paleontology

65. What is the chemical formula of methane?

Ans:- CH₄

66. What is the pH value of pure water?

Ans:- 7

67. Which metal is liquid at room temperature?

Ans:- Mercury

68. Which gas is used for photosynthesis?

Ans:- Carbon dioxide

69. What is the name of our galaxy?

Ans:- Milky Way

70. What is the fastest bird?

Ans:- Peregrine Falcon

71. Which vitamin helps in blood clotting?

Ans:- Vitamin K

72. What is the hardest rock?

Ans:- Diamond (commonly accepted in GK)

73. Which planet rotates on its side?

Ans:- Uranus

74. Which planet is known for its Great Red Spot?

Ans:- Jupiter

75. What is the chemical symbol of copper?

Ans:- Cu

76. What is the chemical symbol of zinc?

Ans:- Zn

77. What is the chemical symbol of lead?

Ans:- Pb

78. What is the chemical symbol of helium?

Ans:- He

79. What is the SI unit of mass?

Ans:- Kilogram

80. What is the SI unit of length?

Ans:- Meter

81. What is the SI unit of time?

Ans:- Second

82. What is the function of red blood cells?

Ans:- Carry oxygen

83. What is the human body’s largest gland?

Ans:- Liver

84. What is the main organ of the respiratory system?

Ans:- Lungs

85. What is the main organ of the circulatory system?

Ans:- Heart

86. What is the hottest planet in the solar system?

Ans:- Venus

87. What is the coldest planet in the solar system?

Ans:- Uranus

88. What is the name of the first artificial satellite?

Ans:- Sputnik 1

89. What is the name of India’s first satellite?

Ans:- Aryabhata

90. What is the study of insects called?

Ans:- Entomology

91. What is the study of microorganisms called?

Ans:- Microbiology

92. What is the speed of sound in air?

Ans:- About 343 m/s

93. What is the main component of natural gas?

Ans:- Methane

94. What is the chemical symbol of chlorine?

Ans:- Cl

95. What is the chemical symbol of magnesium?

Ans:- Mg

96. What is the name of Earth’s natural satellite?

Ans:- Moon

97. Which planet is known as the Blue Planet?

Ans:- Earth

98. What is the main source of Vitamin C?

Ans:- Citrus fruits

99. What is the process by which plants make food?

Ans:- Photosynthesis

100. What is the name of the layer that protects Earth from UV rays?

Ans:- Ozone layer

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