You are here: Quizzes - Common Chemical Formulae



Common Chemical Formulae



Quiz: Test your knowledge of chemical formulas


  1. H2O
  2. CO
  3. CO2
  4. CH4
  5. N2O
  6. NaCl






  7. NH3
  8. HCl
  9. H2SO4
  10. CaCO3
  11. Fe2O3
  12. CH3COOH
  13. H2O2
  14. NaHCO3
  15. C9H8O4
  16. C6H12O6
  17. NaCl
  18. C2H5OH
  19. O3
  20. C6H12O6
  21. MgSO4


Answers: Common formulas list



  1. H2O - water
  2. CO - carbon monoxide
  3. CO2 - carbon dioxide
  4. CH4 - methane
  5. N2O - laughing gas (nitrous oxide)
  6. NaCl - sodium chloride (table salt)
  7. NH3 - ammonia
  8. HCl - hydrochloric acid
  9. H2SO4 - sulfuric acid
  10. CaCO3 - calcium carbonate (limestone, chalk, and marble)
  11. Fe2O3 - iron oxide (rust)
  12. CH3COOH - acetic acid (vinegar)
  13. H2O2 - hydrogen peroxide
  14. NaHCO3 - baking soda
  15. C9H8O4 - aspirin
  16. C6H12O6 - glucose (a type of sugar)
  17. NaCl - sodium chloride (table salt)
  18. C2H5OH - ethanol (alcohol)
  19. O3 - ozone
  20. C6H12O6 - glucose (a type of sugar)
  21. MgSO4 - magnesium sulfate (Epsom salt)