Chemistry MCQs

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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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