This checkpoint tests Block B: synthesis, decomposition, displacement, neutralisation, combustion, metal reactivity, writing equations, and energy changes.
This checkpoint assesses your ability to classify and describe different types of chemical reactions.
Synthesis and decomposition reactions.
Displacement reactions and the metal reactivity series.
Combustion, respiration, rusting and photosynthesis.
Writing and balancing word and simple symbolic equations.
Exothermic vs endothermic reactions.
1. Which equation represents a synthesis reaction?
2. In the reactivity series, which metal is MOST reactive?
3. What are the products of complete combustion of a hydrocarbon?
4. Which reaction type is photosynthesis?
5. Zinc is placed into copper sulfate solution. The blue colour fades and copper metal forms. What type of reaction is this?
6. Which of the following is an endothermic reaction?
7. The word equation for the reaction between magnesium and oxygen is: magnesium + oxygen -> magnesium oxide. What type of reaction is this?
8. What is produced during incomplete combustion that is NOT produced during complete combustion?
9. In the equation 2H₂ + O₂ -> 2H₂O, how many oxygen atoms are on each side?
10. A reaction releases heat and light, produces CO₂ and H₂O, and cannot be reversed. Which statement is correct?
11. Describe the difference between a synthesis reaction and a decomposition reaction. Include a word equation for each. 4 MARKS
12. Explain why a cold pack feels cold when activated. Use the terms endothermic and energy in your answer. 4 MARKS
13. A piece of iron is left outside and rusts. Compare this reaction to the combustion of iron. How are they similar and how do they differ? 4 MARKS
Tick when you have finished all questions and reviewed your answers.