National 5 (Scotland) · National 5 Chemistry

Nature's Chemistry and Energy from Fuels

14 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 14 questions

  1. Which pair of compounds are isomers?
  2. What is the general formula of cycloalkanes?
  3. What is formed when ethene reacts with bromine?
  4. Decane (C₁₀H₂₂) is cracked to produce octane (C₈H₁₈) and one other product. What is the other product?
  5. What functional group is present in alkanols?
  6. What is formed when ethanol reacts with ethanoic acid in the presence of a catalyst?
  7. What is produced when yeast ferments glucose?
  8. What are the products of incomplete combustion of a hydrocarbon?
  9. Using Eh = cmΔT with c = 4.18 kJ/kg/°C, how much energy is needed to raise the temperature of 0.20 kg of water by 15 °C?
  10. A fuel transfers 25.1 kJ to 0.50 kg of water (c = 4.18 kJ/kg/°C). What is the temperature rise?
  11. When 1.2 g of ethanol is burned it raises the temperature of 100 g of water by 25 °C (c = 4.18 kJ/kg/°C). What is the energy released per gram of ethanol burned?
  12. What is a difference between saturated and unsaturated fats?
  13. How is soap made?
  14. What joins amino acids together in a protein?

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