This document contains a 40 question quiz covering various topics in chemistry and science. The questions test knowledge of states of matter, atomic structure, discoveries of scientists, properties of materials, and other foundational science concepts. Some example questions include identifying the state change from liquid to gas as evaporation, knowing protons are positively charged particles located in the atom's nucleus, and recognizing carbon dioxide as the gas released from burning fuel. The quiz covers a wide breadth of scientific topics to assess fundamental chemistry and science understanding.

1. Quiz competition
(National chemistry week)

2. 1. When a coin is dropped is a glass of water, it
will __________.
A. Float
B. Sink
C. Float mid-way
D. Break the glass

3. Answer: B

4. 2. The change of a substance from the liquid state to the gaseous state
is called:
A. Evaporation
B. Condensation
C. Sublimation
D. Filtration

5. Answer: A

6. 3.The change of a substance from the gaseous state to the liquid state is
called:
A. Condensation
B. Decantation
C. Sedimentation
D. Evaporation

7. Answer: A

8. .
4.The change of a substance from the solid state to the
gaseous state is called:
A. Sublimation
B. Evaporation
C. Melting
D. Filtration

9. Answer: A

10. 5. The motion of earth on its own axis is known as
A. Revolution
B. Rotation
C. Motion
D.None

11. Answer: B

12. 6. We can walk easily on moon this statement is
A. True
B. False
C. Sometimes we can walk
D. Sometimes we cannot walk

13. Answer: B

14. 7. The center of an atom that is called
A. Electron
B. Neutron
C. Proton
D. Positron

15. Answer: C

16. 8. Which of the following are present in the nucleus of atom
A. Proton and electron
B. Electron and neutron
C. Proton and neutron
D. Electron and proton

17. Answer: C

18. 9. The negatively charged particle present on atom
A. Electron
B. Proton
C. Neutron
D. Photon

19. Answer: A

20. 10. The positive charged particle present on atom is
A. Electron
B. Neutron
C. Photon
D. Proton

21. Answer: D

22. 11. Who discovered incandescent light bulb
A. Einstein
B. Newton
C. Thomas A. Edison
D. C.V. Raman

23. Answer: C

24. 12. Who discovered Radium
A. Louis Pasteur
B. John Dalton
C. Robert Boyle
D. Marie Curie

25. Answer: D

26. 13. Who gave laws of gravity
A. Einstein
B. Stephen Hawking
C. Newton
D. James Handerson

27. Answer: C

28. 13. Who invented the Steam Engine
A. James Watt
B. John Dalton
C. C.V. Raman
D. Michael Faraday

29. Answer: A

30. 14. Number of electrons present in Sodium
A. 10
B. 11
C. 12
D.13

31. Answer: B

32. 15. Atomic number of calcium
A. 17
B. 18
C. 19
D. 20

33. Answer: D

34. 16. Number of electrons in potassium
A. 15
B. 18
C. 19
D. 10

35. Answer: C

36. 17. Atomic number of Silicon
A. 10
B. 8
C. 13
D. 14

37. Answer: D

38. 18 Objects that emit light on themselves are called
A. Luminous object
B. Non-luminous object
C. Both
D. None

39. Answer: A

40. 19. Biggest planet in our solar system
A. Mars
B. Neptune
C. Earth
D. Jupiter

41. Answer: D

42. 20. Tides in ocean is due to
A. Sun's gravity
B. Moon's gravity
C. Jupiter's gravity
D. Venus's gravity

43. Answer: B

44. 21. You see yourself in mirror because of
A. Reflection
B. Refraction
C. Diffraction
D. None

45. Answer: A

46. 22. Which mirror is used in headlights of the car
A. Concave
B. Convex
C. Spherical
D. Plane

47. Answer: A

48. 23. Taste of acids
A. Salty
B. Sour
C. Bitter
D. Sweet

49. Answer: B

50. 24. Taste of bases
A. Sour
B. Neutral
C. Bitter
D. Salty

51. Answer: C

52. 25. Generally metals are
A. Hard
B. smooth
C. Both
D. Cannot specify

53. Answer: A

54. 26. For which one of the following is density maximum
A. Ice
B. Water
C. Both have same
D. None

55. Answer: B

56. 27. Which have the maximum density
A. Iron
B. Cotton
C. Plastic
D. water

57. Answer: A

58. 28. H2O is commonly known as
A. Alcohol
B. Acid
C. Base
D. Water

59. Answer: D

60. 29. Fossil fuel are formed from the
A. Volcanoes
B. Gases in the atmosphere
C. The remains of living things
D. Water trap inside the rock

61. Answer: C

62. 29. What layer of earth is inferred to be liquid in form
A. Crust
B. Mantle
C. Outer core
D. Inner core

63. Answer: C

64. 30. What type of gas is used to fill balloons that float
A. Helium
B. Nitrogen
C. Oxygen
D. Argon

65. Answer: A

66. 31. In general, pages of books turn brown after a number of years.
Why?
A. Paper has become dusty
B. Paper has become very dry
C. Paper has reacted with oxygen from air
D. Paper has reacted with pollutants in air

67. Answer: C

68. 32.In which liquid is nail polish soluble?
A. Alcohol
B. Acetone
C. Oil
D. Water

69. Answer: B

70. 33. The measurement of hotness and coldness of air is called
A. Temperature
B. Density
C. Mass
D. Gravity

71. Answer: A

72. 34. Objects that form shadows and covers the light that hit them is
called
A. Transparent
B. Luminous
C. Opaque
D. All

73. Answer: C

74. 35. Energy from sun to earth comes via
A. Conduction
B. Convection
C. Transmission
D. Radition

75. Answer: D

76. 36. The filament of an electric bulb is made of which metal
A. Iron
B. Copper
C. Nichrome
D. Tungsten

77. Answer: D

78. 37. Rainbow contains how many colours
A. 5
B. 7
C. 8
D. 9

79. Answer: B

80. 38. The largest sources of water on earth
A. River
B. Pound
C. Ocean
D. Lake

81. Answer: C

82. 39. Gas release from burning fuel is
A. Nitic oxide
B. Carbon monoxide
C. Carbon dioxde
D. Oxygen

83. Answer: C

84. 40. Which of the following is not the property of metals
A. Good conductor
B. Luster
C. Malleable
D. Brittle

85. Answer: D

86. Thank you !!!