Chemistry MCQs

1. What is the atomic number of carbon?

a) 6
b) 12
c) 14
d) 16

Answer: a) 6

2. Which of the following elements is a noble gas?

a) Nitrogen
b) Oxygen
c) Helium
d) Fluorine

Answer: c) Helium

3. What is the chemical symbol for gold?

a) Au
b) Ag
c) Fe
d) Cu

Answer: a) Au

4. Which of the following is a halogen?

a) Sodium
b) Chlorine
c) Calcium
d) Potassium

Answer: b) Chlorine

5. What is the formula for sodium chloride?

a) NaCl
b) NaOH
c) Na2CO3
d) NaNO3

Answer: a) NaCl

6. Which of the following is an alkali metal?

a) Calcium
b) Lithium
c) Iron
d) Aluminum

Answer: b) Lithium

7. What is the chemical formula for water?

a) H2O2
b) CO2
c) H2O
d) CH4

Answer: c) H2O

8. What is the pH of a neutral solution?

a) 0
b) 7
c) 14
d) -7

Answer: b) 7

9. Which of the following is a transition metal?

a) Potassium
b) Zinc
c) Sodium
d) Magnesium

Answer: b) Zinc

10. What is the chemical formula for methane?

a) CO2
b) CH4
c) H2O
d) NH3

Answer: b) CH4

11. What is the chemical formula for sulfuric acid?

a) HCl
b) H2SO4
c) HNO3
d) H3PO4

Answer: b) H2SO4

12. Which of the following is a greenhouse gas?

a) Oxygen (O2)
b) Carbon dioxide (CO2)
c) Nitrogen (N2)
d) Hydrogen (H2)

Answer: b) Carbon dioxide (CO2)

13. What is the chemical symbol for iron?

a) Ir
b) Fe
c) Au
d) Ag

Answer: b) Fe

14. What is the chemical formula for ammonia?

a) NH3
b) N2
c) NH4Cl
d) H2SO4

Answer: a) NH3

15. Which of the following is a noble gas?

a) Oxygen (O2)
b) Neon (Ne)
c) Hydrogen (H2)
d) Nitrogen (N2)

Answer: b) Neon (Ne)

16. What is the chemical formula for hydrogen peroxide?

a) H2O
b) H2O2
c) HOCl
d) HCl

Answer: b) H2O2

17. Which of the following is a non-metal?

a) Sodium (Na)
b) Silicon (Si)
c) Calcium (Ca)
d) Potassium (K)

Answer: b) Silicon (Si)

18. What is the chemical symbol for potassium?

a) K
b) P
c) Ca
d) Na

Answer: a) K

19. Which of the following is a strong acid?

a) Acetic acid
b) Hydrochloric acid
c) Citric acid
d) Carbonic acid

Answer: b) Hydrochloric acid

20. What is the chemical formula for carbon dioxide?

a) CO
b) CO2
c) C2O
d) CO3

Answer: b) CO2

21. What is the atomic number of oxygen?

a) 6
b) 8
c) 12
d) 16

Answer: b) 8

22. Which of the following is a transition metal?

a) Zinc (Zn)
b) Sodium (Na)
c) Calcium (Ca)
d) Magnesium (Mg)

Answer: a) Zinc (Zn)

23. What is the chemical formula for hydrochloric acid?

a) H2SO4
b) HCl
c) HNO3
d) H3PO4

Answer: b) HCl

24. Which of the following is a compound?

a) Oxygen (O2)
b) Nitrogen (N2)
c) Carbon dioxide (CO2)
d) Neon (Ne)

Answer: c) Carbon dioxide (CO2)

25. What is the chemical symbol for helium?

a) He
b) H
c) N
d) Ne

Answer: a) He

26. Which of the following is a halogen?

a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Magnesium (Mg)

Answer: b) Chlorine (Cl)

27. What is the chemical formula for table salt?

a) NaCl
b) NaOH
c) HCl
d) KOH

Answer: a) NaCl

28. Which of the following is a noble gas?

a) Nitrogen (N2)
b) Helium (He)
c) Hydrogen (H2)
d) Carbon dioxide (CO2)

Answer: b) Helium (He)

29. What is the atomic number of nitrogen?

a) 5
b) 6
c) 7
d) 8

Answer: c) 7

30. Which of the following is a strong base?

a) Acetic acid
b) Sodium hydroxide
c) Citric acid
d) Carbonic acid

Answer: b) Sodium hydroxide

31. What is the chemical symbol for silver?

a) Ag
b) Au
c) Pt
d) Al

Answer: a) Ag

32. Which of the following is a compound?

a) Helium (He)
b) Nitrogen (N2)
c) Oxygen (O2)
d) Hydrogen (H2)

Answer: b) Nitrogen (N2)

33. What is the chemical formula for sulfur dioxide?

a) SO
b) SO2
c) S2O
d) SO3

Answer: b) SO2

34. Which of the following is a metalloid?

a) Carbon (C)
b) Silicon (Si)
c) Aluminum (Al)
d) Sodium (Na)

Answer: b) Silicon (Si)

35. What is the chemical formula for hydrogen sulfide?

a) H2S
b) HS2
c) SH2
d) H2SO3

Answer: a) H2S

36. Which of the following is a noble gas?

a) Oxygen (O2)
b) Nitrogen (N2)
c) Helium (He)
d) Carbon dioxide (CO2)

Answer: c) Helium (He)

37. What is the atomic number of potassium?

a) 18
b) 25
c) 39
d) 52

Answer: c) 39

38. What is the chemical symbol for mercury?

a) Hg
b) Mg
c) Fe
d) Co

Answer: a) Hg

39. Which of the following is a strong acid?

a) Acetic acid
b) Hydrochloric acid
c) Carbonic acid
d) Citric acid

Answer: b) Hydrochloric acid

40. What is the chemical formula for hydrofluoric acid?

a) HF
b) HCl
c) H2SO4
d) HNO3

Answer: a) HF

41. Which of the following is a metal?

a) Carbon (C)
b) Oxygen (O)
c) Iron (Fe)
d) Sulfur (S)

Answer: c) Iron (Fe)

42. What is the chemical formula for sodium bicarbonate?

a) NaHCO3
b) NaOH
c) NaCl
d) Na2CO3

Answer: a) NaHCO3

43. Which of the following is a strong base?

a) Acetic acid
b) Sodium hydroxide
c) Ammonia
d) Carbonic acid

Answer: b) Sodium hydroxide

44. What is the chemical formula for nitric acid?

a) HNO2
b) HNO3
c) H2SO4
d) HCl

Answer: b) HNO3

45. Which of the following is a diatomic molecule?

a) Carbon dioxide (CO2)
b) Oxygen (O2)
c) Methane (CH4)
d) Water (H2O)

Answer: b) Oxygen (O2)

46. What is the chemical symbol for copper?

a) Co
b) Cu
c) Cr
d) Cs

Answer: b) Cu

47. Which of the following is a halogen?

a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Magnesium (Mg)

Answer: b) Chlorine (Cl)

48. What is the chemical formula for phosphoric acid?

a) HCl
b) H2SO4
c) H3PO4
d) HNO3

Answer: c) H3PO4

49. Which of the following is a non-metal?

a) Sodium (Na)
b) Aluminum (Al)
c) Calcium (Ca)
d) Carbon (C)

Answer: d) Carbon (C)

50. What is the chemical symbol for sodium?

a) So
b) Na
c) Sn
d) Sd

Answer: b) Na

51. What is the chemical formula for sulfuric acid?

a) H2SO4
b) HCl
c) HNO3
d) H3PO4

Answer: a) H2SO4

52. Which of the following is a transition metal?

a) Zinc (Zn)
b) Sodium (Na)
c) Calcium (Ca)
d) Iron (Fe)

Answer: d) Iron (Fe)

53. What is the chemical formula for hydrochloric acid?

a) HCl
b) H2SO4
c) HNO3
d) H3PO4

Answer: a) HCl

54. Which of the following is a diatomic molecule?

a) Carbon monoxide (CO)
b) Oxygen (O2)
c) Methane (CH4)
d) Water (H2O)

Answer: b) Oxygen (O2)

55. What is the chemical symbol for potassium?

a) K
b) Ca
c) Cu
d) Ag

Answer: a) K

56. Which of the following is a noble gas?

a) Neon (Ne)
b) Fluorine (F)
c) Chlorine (Cl)
d) Sodium (Na)

Answer: a) Neon (Ne)

57. What is the chemical formula for hydrobromic acid?

a) HBr
b) HCl
c) H2SO4
d) HNO3

Answer: a) HBr

58. Which of the following is a metal?

a) Carbon (C)
b) Oxygen (O)
c) Copper (Cu)
d) Sulfur (S)

Answer: c) Copper (Cu)

59. What is the chemical symbol for lead?

a) Ld
b) Pb
c) Pl
d) Pt

Answer: b) Pb

60. Which of the following is a strong base?

a) Ammonia (NH3)
b) Sodium hydroxide (NaOH)
c) Acetic acid (CH3COOH)
d) Carbonic acid (H2CO3)

Answer: b) Sodium hydroxide (NaOH)

61. What is the chemical formula for acetic acid?

a) HCl
b) CH3COOH
c) H2SO4
d) HNO3

Answer: b) CH3COOH

62. Which of the following is a metalloid?

a) Aluminum (Al)
b) Silicon (Si)
c) Sodium (Na)
d) Potassium (K)

Answer: b) Silicon (Si)

63. What is the chemical symbol for tin?

a) Ti
b) Tn
c) Sn
d) St

Answer: c) Sn

64. Which of the following is a strong acid?

a) Nitric acid
b) Acetic acid
c) Sulfuric acid
d) Carbonic acid

Answer: c) Sulfuric acid

65. What is the chemical formula for nitrous acid?

a) HNO2
b) HNO3
c) H2SO4
d) HCl

Answer: a) HNO2

66. Which of the following is a non-metal?

a) Calcium (Ca)
b) Iron (Fe)
c) Hydrogen (H)
d) Sodium (Na)

Answer: c) Hydrogen (H)

67. What is the chemical symbol for chromium?

a) Cr
b) Ch
c) Cn
d) Cp

Answer: a) Cr

68. Which of the following is a diatomic molecule?

a) Carbon dioxide (CO2)
b) Oxygen (O2)
c) Methane (CH4)
d) Water (H2O)

Answer: b) Oxygen (O2)

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