3 Organic chemistry and analysis

Practice questions on Organic chemistry and analysis

• Zinc oxide reacts with carbon according to the balanced equation: 2ZnO + C → 2Zn + CO₂. A … (5 marks, Explain)
• Magnesium burns in oxygen according to the balanced equation: 2Mg + O₂ → 2MgO. A student b… (5 marks, Explain)
• Iron reacts with hydrochloric acid according to the balanced equation: Fe + 2HCl → FeCl₂ +… (5 marks, Explain)
• Copper carbonate decomposes when heated according to the balanced equation: CuCO₃ → CuO + … (5 marks, Explain)
• Butan-1-ol is an alcohol that can be produced by fermentation. Describe the structure of b… (5 marks, Describe)
• Methanol (CH₃OH) and 1-chloropropane (CH₃CH₂CH₂Cl) are examples of an alcohol and a haloge… (5 marks, Explain)
• Ethanol (C₂H₅OH) and 1-bromopropane (CH₃CH₂CH₂Br) are both organic compounds. Describe the… (5 marks, Describe)
• Propanoic acid is a carboxylic acid. Describe the chemical properties of propanoic acid an… (5 marks, Describe)
• Methanal (HCHO) and ethanal (CH₃CHO) are both aldehydes. Propanone (CH₃COCH₃) is a ketone.… (5 marks, Explain)
• The law of conservation of mass states that no atoms are lost or made during a chemical re… (5 marks, Explain)
• Magnesium reacts with hydrochloric acid according to the equation: Mg + 2HCl → MgCl₂ + H₂.… (5 marks, Explain)
• Iron reacts with sulfur according to the equation: Fe + S → FeS. A student heats 5.6 g of … (5 marks, Explain)
• Sodium chloride is an ionic compound formed when sodium reacts with chlorine. Explain how … (5 marks, Explain)
• Calcium burns in oxygen to form calcium oxide. A student investigates this reaction and st… (5 marks, Explain)
• Calcium carbonate reacts with hydrochloric acid according to the equation: CaCO₃ + 2HCl → … (5 marks, Explain)
• Iron reacts with sulfur according to the equation: Fe + S → FeS. A student reacts 56 g of … (5 marks, Explain)
• A student uses paper chromatography to identify the dyes present in a food colouring. The … (5 marks, Explain)
• A scientist uses mass spectrometry and infrared spectroscopy to analyse an unknown organic… (5 marks, Explain)
• A chemist reacts magnesium with excess hydrochloric acid. The balanced equation for the re… (5 marks, Explain)
• A forensic scientist uses thin-layer chromatography (TLC) to separate compounds found in a… (5 marks, Explain)