Chemical Formula Mcqs 1- What is the chemical formula of water? A. HClB. CO₂C. H₂OD. NaOH View Answer Answer : C. H₂O Description 2- What is the chemical formula of common salt? A. NaClB. KClC. NaOHD. HCl View Answer Answer : A. NaCl Description 3- What is the chemical formula of carbon dioxide? A. COB. CO₂ C. C₂OD. C₂H₆ View Answer Answer : B. CO₂ Description 4- What is the chemical formula of ammonia? A. NH₄B. NH₃C. NO₂D. N₂O View Answer Answer : B. NH₃ Description 5- What is the chemical formula of sulfuric acid? A. HClB. HNO₃C. H₂CO₃D. H₂SO₄ View Answer Answer : D. H₂SO₄ Description 6- What is the formula for calcium carbonate? A. CaCl₂B. CaCO₃C. CaOD. CaSO₄ View Answer Answer : B. CaCO₃ Description 7- What is the chemical formula for methane? A. CH₄B. C₂H₆C. C₂H₄D. CO View Answer Answer : A. CH₄ Description 8- What is the chemical formula for nitric acid? A. HNO₃ B. H₂SO₄C. HClD. H₂CO₃ View Answer Answer : A. HNO₃ Description 9- What is the chemical formula of baking soda? A. NaClB. NaOHC. Na₂CO₃D. NaHCO₃ View Answer Answer : D. NaHCO₃ Description 10- What is the formula for hydrochloric acid? A. HBrB. HClC. H₂SD. HNO₃ View Answer Answer : B. HCl Description 11- What is the formula for acetic acid (vinegar)? A. CH₃OHB. C₂H₅OHC. HCOOHD. CH₃COOH View Answer Answer : D. CH₃COOH Description 12- What is the formula for glucose? A. C₆H₁₂O₆ B. C₁₂H₂₂O₁₁C. C₆H₁₀O₅D. C₃H₆O₃ View Answer Answer : A. C₆H₁₂O₆ Description 13- What is the formula of rust (iron oxide)? A. Fe₂O₃B. FeSC. FeOD. Fe(OH)₃ View Answer Answer : A. Fe₂O₃ Description 14- What is the chemical formula of ethanol? A. C₆H₆B. CH₃OHC. C₂H₅OH D. CH₃COOH View Answer Answer : C. C₂H₅OH Description 15- What is the formula of ozone? A. O₃B. O₂C. O₄D. OH View Answer Answer : A. O₃ Description 16- What is the formula of hydrogen peroxide? A. H₂OB. HOC. H₂O₂ D. H₃O View Answer Answer : C. H₂O₂ Description 17- What is the formula for gypsum? A. CaCl₂B. CaCO₃C. Ca(OH)₂D. CaSO₄·2H₂O View Answer Answer : D. CaSO₄·2H₂O Description 18- What is the chemical formula of laughing gas? A. NO₂B. N₂OC. NH₃D. CO View Answer Answer : B. N₂O Description 19- What is the formula for sodium hydroxide? A. KOHB. NaClC. NaOHD. NaHCO₃ View Answer Answer : D. NaOH Description 20- What is the chemical formula for lime (quicklime)? A. CaOB. CaSO₄C. CaCO₃D. Ca(OH)₂ View Answer Answer : A. CaO Description 1 2 3 4 5 6
