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Combustion Reaction Quiz UK year 8
Year 8 • Chemistry
🔥❄️💨 Combustion Reactions Quiz
Test your understanding of combustion reactions, fuels, the fire triangle, and complete vs incomplete combustion. Answer all 30 questions.
Quiz Instructions
- Attempt all 30 questions.
- Click “Show Answer” to reveal the correct answer.
1. What is combustion?
A. Reaction with nitrogen
B. Reaction with oxygen releasing energy
C. Reaction absorbing heat
D. Physical change
A. Reaction with nitrogen
B. Reaction with oxygen releasing energy
C. Reaction absorbing heat
D. Physical change
2. Which gas is needed for combustion?
A. Hydrogen
B. Carbon dioxide
C. Oxygen
D. Nitrogen
A. Hydrogen
B. Carbon dioxide
C. Oxygen
D. Nitrogen
3. Which is a fuel?
A. Water
B. Wood
C. Ash
D. Carbon dioxide
A. Water
B. Wood
C. Ash
D. Carbon dioxide
4. Which two products form when methane burns completely?
A. CO and H₂O
B. CO₂ and H₂O
C. O₂ and H₂
D. CO₂ and soot
A. CO and H₂O
B. CO₂ and H₂O
C. O₂ and H₂
D. CO₂ and soot
5. Combustion reactions are:
A. Endothermic
B. Neutral
C. Exothermic
D. Reversible
A. Endothermic
B. Neutral
C. Exothermic
D. Reversible
6. What forms when magnesium burns?
A. Mg(OH)₂
B. MgO
C. MgCO₃
D. MgCl₂
A. Mg(OH)₂
B. MgO
C. MgCO₃
D. MgCl₂
7. A yellow smoky flame shows:
A. Complete combustion
B. Incomplete combustion
C. No combustion
D. Oxidation only
A. Complete combustion
B. Incomplete combustion
C. No combustion
D. Oxidation only
8. Which poisonous gas forms in incomplete combustion?
A. CO₂
B. SO₂
C. CO
D. H₂
A. CO₂
B. SO₂
C. CO
D. H₂
9. Which part of the fire triangle provides air?
A. Fuel
B. Heat
C. Oxygen
D. Smoke
A. Fuel
B. Heat
C. Oxygen
D. Smoke
10. Which is a hydrocarbon?
A. CO₂
B. H₂O
C. CH₄
D. NaCl
A. CO₂
B. H₂O
C. CH₄
D. NaCl
11. Combustion needs oxygen.
12. Combustion reactions absorb heat.
13. Carbon monoxide is harmless.
14. Hydrocarbons contain only carbon and hydrogen.
15. Magnesium burns to form magnesium oxide.
16. Name two things needed for combustion.
17. Name the three parts of the fire triangle.
18. Write a word equation for burning hydrogen.
19. Write a word equation for burning magnesium.
20. What is an exothermic reaction?
21. Name one product of incomplete combustion.
22. What gas supports burning?
23. Name a liquid fuel.
24. Name a gaseous fuel.
25. What happens if oxygen is removed from a fire?
26. Write the symbol equation for hydrogen burning.
27. Name one solid fuel.
28. Which part of the fire triangle starts combustion?
29. What is soot?
30. Write a word equation for burning butane.
© Aviate Learning – Combustion Reactions Quiz (Year 8)